From patchwork Wed May 13 13:32:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11546377 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D98771893 for ; Wed, 13 May 2020 13:45:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0C50622363 for ; Wed, 13 May 2020 13:38:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sxNYluR8"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="czTVDgpm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C50622363 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=samsung.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=n23npSElcCUS4IXUNc0XmVBrSj/cRlep9D2FUR+2obk=; b=sxNYluR8MkVNxqVpPj3nMHelPT EHqqsdTu8nPnlBsTGo0OqSYbo2DXtFDNk0kcfXr41wI/GE6zigeqELU7WmA4029A4JBz0nOuUZiHE eS/mnqFKjB3RFKJHi3B9o3vFVurChAaAE2gMgI/HHeRef+bbgLchxSn4bMHJ/iNiQEKa0Ehsi2Gfw LJcUI5WTgo20BdtGTSh8VdTLZdAPPOUFZJfdMxmLof+hwTiRmNfuysc2IxOynMKlABUzFeJIegPsc Je3+5H3sWVIotA68nzRzbl43ux7bcPzKQYUt9XovZ58PJmzCmjXQNde0c8hKajlWyhR42kfdkXADx /IscODLg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYraS-0008Ca-I6; Wed, 13 May 2020 13:38:16 +0000 Received: from mailout2.w1.samsung.com ([210.118.77.12]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jYrVU-0001St-RL for linux-mediatek@lists.infradead.org; Wed, 13 May 2020 13:33:18 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20200513133307euoutp025849f16e32a53266b9a0fae48b96e561~OmcRk9CGE3223232232euoutp02u for ; Wed, 13 May 2020 13:33:07 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20200513133307euoutp025849f16e32a53266b9a0fae48b96e561~OmcRk9CGE3223232232euoutp02u DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1589376787; bh=63lQGohYor0znA7PtoKsyn+5okdRMMenYZY4rphErk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=czTVDgpmbB1fqHhgM9zf8z0cj85Tbi++HyhhGzMCzYtolUN3XSicX8UjIS7awfHxD JZ/R8EBf00NDWkBmaouLn/k5Hfcji1B4tgGrZBMcq5aOgxi13oaENTGHKlzCM9trhW sCZazNgkR/jFCTAGt4ALs/PKlpMTTNVIM5M0kio0= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200513133306eucas1p1b51a94bf57046cb6c3f3a4997bc97aa9~OmcRRmbjw2164721647eucas1p1u; Wed, 13 May 2020 13:33:06 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id D5.D8.60698.217FBBE5; Wed, 13 May 2020 14:33:06 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200513133306eucas1p1ab15386cc4bbcf09052a8175d3660997~OmcQ0RUho0874908749eucas1p1h; Wed, 13 May 2020 13:33:06 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200513133306eusmtrp17acb0e826bf8839bed666e654ab020ee~OmcQzRtpK1050610506eusmtrp1C; Wed, 13 May 2020 13:33:06 +0000 (GMT) X-AuditID: cbfec7f5-a29ff7000001ed1a-ca-5ebbf712814b Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 8A.37.07950.217FBBE5; Wed, 13 May 2020 14:33:06 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200513133305eusmtip1eeaac7d44d1f5279193afb39c353dc35~OmcQBSTh80741507415eusmtip1i; Wed, 13 May 2020 13:33:05 +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 v5 14/38] drm: mediatek: use common helper for a scatterlist contiguity check Date: Wed, 13 May 2020 15:32:21 +0200 Message-Id: <20200513133245.6408-14-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200513133245.6408-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSaUhUURjlzlvmOTn5GiVvKhkjRQm5oNALM1KkXhYZ1K/AZdSXSm7MqKkF iZbZuGepDSHjZJl7TuI2lbvjgpIpLriN6A8zLXNcUkybx1P7d875zvnOx+USiKgTsyBCwqMY abgkVIwL0NrOzf6zog2Nj0N25Xkqvb+bR1XnV2GUKj0dpXZrsxFqaO0XTpWUdfAoZZMLtTo0 w6PUs8MYNdj4GqcGkwYAVdE+yacSHztRk1NdKNWyPIddMqHLC8oB/XldidINikk+rS59htN1 6zqMnk7V8uiPRY/o8Z1ZhM4ZLQa0ZiwBpzP/OtAZNaWA1quP3xTeEVwIZEJDYhip/UU/QfCy IjoyzyS2MFWDJYBpYzkwIiDpDMdzhzE5EBAi8j2AWX90gCOrAL5b6cM5ogewp/4tuh8pVFTz uUExgGPzSv5B5GVTDsa6cNIRypfkOIvNyCcAdqUbsyaE/IRAVeOWYRVBmJK+cHzlIQtR8iTs aXNm7ULSFVaO1PK4MmtY9qEZYbGRQV+YaELZNZCc4sPkIT3gTB6wO2V+L2AKF7Q1fA5bwd6c tL1AEoAz/RV8jqQBOJiYv5d2gRP9Wzh7BUKegVWN9pzsBnX6bj4rQ/IwHF06wsqIAT6vzUM4 WQhTkkWc+xRUaCsPalu+ftuz0HDnzWXuedoA3OzcBVnAWvG/SwlAKTBnomVhQYzMKZy5byeT hMmiw4PsAiLC1MDwu3p3tGv14Mu2fysgCSA2FupGND4iTBIjiwtrBZBAxGbCG1UGSRgoiYtn pBG+0uhQRtYKLAlUbC50Un33FpFBkijmHsNEMtL9KY8wskgAvMWSnIxRZXuP2nPDW2XFq4gH KdqUztgr4piOoJ91s81Fi6/yT/wutTnN2NuiMx4ttwcCfNwRLeZv4zG7PbfUUvdDz5RrJG7n nrYf82qfHxvcKHtguXvVXXc3bifTy3M8zjj00GKuZ17A0S3XxhcW0sqihrHIvlvXlNcF8jK/ AjEqC5Y42iJSmeQf1keEsVkDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJIsWRmVeSWpSXmKPExsVy+t/xu7pC33fHGcy+L2bRe+4kk8XGGetZ LRb19rJY/N82kdniytf3bBYrVx9lsliw39riy5WHTBabHl9jtbi8aw6bxeXmi4wWa4/cZbdo ajG2uHvvBIvFwQ9PWB34PdbMW8PosffbAhaPnbPusntsWtXJ5rH92wNWj/vdx5k8Ni+p97j9 7zGzx+Qbyxk9dt9sYPPo/2vg0bdlFaPH501yAbxRejZF+aUlqQoZ+cUltkrRhhZGeoaWFnpG JpZ6hsbmsVZGpkr6djYpqTmZZalF+nYJehkfZpUWTOevWNi9m7WB8T5PFyMnh4SAicTCWRvZ uxi5OIQEljJKbL58iR0iISNxcloDK4QtLPHnWhcbRNEnRoknfceYQBJsAoYSXW8hEiICnYwS 07o/go1iFjjGLLHx8XtmkCphgViJPzd6gKo4OFgEVCVOHTYBCfMK2Eqsu76NCWKDvMTqDQfA yjmB4q/u7GcBsYUE8iX2Lt7HNoGRbwEjwypGkdTS4tz03GIjveLE3OLSvHS95PzcTYzAaNp2 7OeWHYxd74IPMQpwMCrx8Frc2h0nxJpYVlyZe4hRgoNZSYTXbz1QiDclsbIqtSg/vqg0J7X4 EKMp0E0TmaVEk/OBkZ5XEm9oamhuYWlobmxubGahJM7bIXAwRkggPbEkNTs1tSC1CKaPiYNT qoFxyUSTjBO8S79PKvCevEr5lMybdduMYlhSU49uD389+c7n8kdt0x3Nbu9wXiag/GBfosed Lxd5mj48/pS1/vjFZ+pr1F5mqJx+8OcLd8OWyOu/eeb08k+SWLN/hdwt++5IVQNjQ+7Ky21n y15KvJ1/I/9GUrm7AtOiJ1rFxvuUX33tZ875peHYq8RSnJFoqMVcVJwIAI8m24y8AgAA X-CMS-MailID: 20200513133306eucas1p1ab15386cc4bbcf09052a8175d3660997 X-Msg-Generator: CA X-RootMTR: 20200513133306eucas1p1ab15386cc4bbcf09052a8175d3660997 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200513133306eucas1p1ab15386cc4bbcf09052a8175d3660997 References: <20200513132114.6046-1-m.szyprowski@samsung.com> <20200513133245.6408-1-m.szyprowski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200513_063309_218506_EF42EAA0 X-CRM114-Status: GOOD ( 14.84 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [210.118.77.12 listed in wl.mailspike.net] -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [210.118.77.12 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chun-Kuang Hu , Philipp Zabel , Bartlomiej Zolnierkiewicz , David Airlie , linux-mediatek@lists.infradead.org, Daniel Vetter , Matthias Brugger , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org 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 --- 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@samsung.com/T/ --- drivers/gpu/drm/mediatek/mtk_drm_gem.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c index b04a3c2..6c34c06 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c @@ -212,34 +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_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)