From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4C8AC4725F for ; Tue, 5 May 2020 08:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCBB0206CC for ; Tue, 5 May 2020 08:47:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="aN+n9AU0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728839AbgEEIr1 (ORCPT ); Tue, 5 May 2020 04:47:27 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:48334 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728701AbgEEIqh (ORCPT ); Tue, 5 May 2020 04:46:37 -0400 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084635euoutp018891e05891d8e41bfa544399549f4293~MFX0Prffo0374703747euoutp01X for ; Tue, 5 May 2020 08:46:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200505084635euoutp018891e05891d8e41bfa544399549f4293~MFX0Prffo0374703747euoutp01X DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668395; bh=B21ieA9YMhUmpiZXxj4FSZPViD0ahaYsrF+5TUs6jmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aN+n9AU0VoTdy0wLfZkU2wII1OVNcc+cenIlZU+s0RwUN/ecsTBUtn5NBHgVOI8mP d6VPBl66sy37JwE17ywyjCTX9Zgm4s4M0sblV/LuwHXf4YDqMU85pVH/KFfdjusOcY 7PBHznx6MJLhE+YeYZniPPmL5FwjJ0mLsiButzvk= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200505084634eucas1p2f13263895e2ba3729986bd6357ca169d~MFXz1gw1L2338223382eucas1p2F; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 90.42.60679.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0~MFXzSEDHK2423624236eucas1p18; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084634eusmtrp126aba354bba07622efd7ab30120ded8d~MFXzRS61A0942309423eusmtrp1j; Tue, 5 May 2020 08:46:34 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-4a-5eb127eab0cc Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4D.21.07950.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084633eusmtip1d32281152fa44131a67ab45c0c0a5134~MFXyomUX20309503095eusmtip1w; Tue, 5 May 2020 08:46:33 +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 Cc: Marek Szyprowski , Christoph Hellwig , Robin Murphy , Bartlomiej Zolnierkiewicz , linux-arm-kernel@lists.infradead.org, David Airlie , Daniel Vetter , Mauro Carvalho Chehab , Laurent Pinchart , Kieran Bingham , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH v3 18/25] drm: rcar-du: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:46:07 +0200 Message-Id: <20200505084614.30424-18-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200505084614.30424-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSe0hTYRztu3f37ipOrtP0Q0Nr9CAhTY24spIkqUsFCv1RCGlLr1N0Uza1 VKJhKs5H+CCbFmHh++18lE7xgTZNGuELLR/TWaDhI2emIprzqv13fud3zu8cPj4C5fdh9kSY NJqRSUURAtyc0/xpU3dh4Vx9wMX83ctUpq4foepVtRi125yNUsN/lnGqvLIXoQo7hNTqaDqg lNlFXGpteAah1IZRjBpqfYNTGXVNGNU0v4RQ1T2TXKpEvY1QXStz2DWSrnpbBej29UIO/To1 H6PVFUqc/rCux+jpdC1CNxQ9o7/vGFA6d6wU0JpxBU6/aKwAtFHt6Gfhb34lmIkIi2Vkrl4P zUNbNLeipsknwzlCBcizTANmBCQvwaSsUk4aMCf4ZBmAZQ3JODusAdhXn4yygxHA3hINfmjp L9cfLEoBLFhqw44sFd9SuSYVTrrBtMW0fYcNmbx3K9PCJELJbRQm/TLdJQhr8i5sf+lgghzy DGxJSTDJeaQX1I02ImyYE6ys60RN2GyPNwxO7NeD5BQXGhNrDhr5wE717AG2hgvaRi6LT8CB 3AwOa3gO4IyumssOGQAOJaoAqxLCCd0WbmqBkudhbasrS3vDlVnVPg1JSzi2aGWi0T2Y0/wK ZWkeTE3hs+qzsEBbcxTb9XUQZTEN9fofgH2fXgCLN5XcLOBU8D+sEIAKYMfEyCViRu4uZR67 yEUSeYxU7BIUKVGDvf81sKNd+whatx91A5IAAgvefWNtAB8TxcrjJN0AEqjAhleyURfA5wWL 4uIZWWSgLCaCkXcDB4IjsON5vJ9/wCfFomgmnGGiGNnhFiHM7BWgSD+y4uPhu5TTjt5715eU P1Ta/cVqcHq5JyTcc+TOcc0NR7/PsqncBJWz61OlU+DVk6ktUVnt7prQ28U1bTvW173H8m7a i4OmV1ulc6ij0HemJyFjpuFnwVAAlM7ZbJ3KmTS62P6WbZxGbBVSjZUz8BQf84fxIVmgwzCu dfor4MhDRW7OqEwu+gcVeaL4WwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJIsWRmVeSWpSXmKPExsVy+t/xu7qv1DfGGay6I2LRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8elaN6NF58Ql7BZfrjxkstj0+BqrxeVdc9gsejZsZbXY +vIdk8XaI3fZLZZt+sNkcfDDE1YHAY8189Yweuz9toDFY3bHTFaPTas62Ty2f3vA6nG/+ziT x+Yl9R63/z1m9ph8Yzmjx+6bDWwefVtWMXp83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl7Fzt1fBfYGKK5OsGxin8XUxcnJICJhInFz5 gBnEFhJYyihxdz43RFxG4uS0BlYIW1jiz7Uuti5GLqCaT4wSd87eYQNJsAkYSnS9hUiICHQy Skzr/sgO4jALtLBILO25DtYuLBAosa/7BJDNwcEioCqxs60aJMwrYCdx7toWJogN8hKrNxwA u4ITKP74EsQCIYFCiQ/nv7NOYORbwMiwilEktbQ4Nz232EivODG3uDQvXS85P3cTIzCath37 uWUHY9e74EOMAhyMSjy8G76ujxNiTSwrrsw9xCjBwawkwrvsx4Y4Id6UxMqq1KL8+KLSnNTi Q4ymQDdNZJYSTc4HRnpeSbyhqaG5haWhubG5sZmFkjhvh8DBGCGB9MSS1OzU1ILUIpg+Jg5O qQbGa+t5C1pub5nEF8C18XKowK6j8Z3vvzgrnmne6rw3UzLh0Prw/tV+c6a4zbpyoeyix9t1 zVMcZicGHdw2JXjv5Hm2e6s+7n2jVOWZGXT41y7X/8b/eVOPftp2/sry255/tK0mKv47XZX9 YW97tP4Ei6PvhJZ3TYya/npHk19fuHloichtzzlb25RYijMSDbWYi4oTAS4gPqG8AgAA X-CMS-MailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 References: <20200505083926.28503-1-m.szyprowski@samsung.com> <20200505084614.30424-1-m.szyprowski@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Documentation/DMA-API-HOWTO.txt states that dma_map_sg returns the numer of the created entries in the DMA address space. However the subsequent calls to dma_sync_sg_for_{device,cpu} and dma_unmap_sg must be called with the original number of the entries passed to dma_map_sg. The sg_table->nents in turn holds the result of the dma_map_sg call as stated in include/linux/scatterlist.h. A common mistake was to ignore a result of the dma_map_sg function and don't use the sg_table->orig_nents at all. To avoid such issues, lets use common dma-mapping wrappers operating directly on the struct sg_table objects and adjust references to the nents and orig_nents respectively. Signed-off-by: Marek Szyprowski --- For more information, see '[PATCH v3 00/25] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lkml.org/lkml/2020/5/5/187 --- drivers/media/platform/vsp1/vsp1_drm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a4a45d6..8a2624b 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -912,8 +912,9 @@ int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) * skip cache sync. This will need to be revisited when support for * non-coherent buffers will be added to the DU driver. */ - return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + return dma_map_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + return sgt->nents; } EXPORT_SYMBOL_GPL(vsp1_du_map_sg); @@ -921,8 +922,8 @@ void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); - dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); -- 1.9.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA784C54E46 for ; Tue, 5 May 2020 08:46:54 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 804DC206B9 for ; Tue, 5 May 2020 08:46:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="aN+n9AU0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 804DC206B9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=samsung.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 50318228DF; Tue, 5 May 2020 08:46:54 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id i-1JC9KRvSIy; Tue, 5 May 2020 08:46:49 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 85F8423115; Tue, 5 May 2020 08:46:41 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7D3D2C0175; Tue, 5 May 2020 08:46:41 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 6C918C0175 for ; Tue, 5 May 2020 08:46:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 401E4865F6 for ; Tue, 5 May 2020 08:46:39 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ClOPNwWT24V7 for ; Tue, 5 May 2020 08:46:37 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mailout2.w1.samsung.com (mailout2.w1.samsung.com [210.118.77.12]) by hemlock.osuosl.org (Postfix) with ESMTPS id EB8628955D for ; Tue, 5 May 2020 08:46:36 +0000 (UTC) Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084635euoutp029acb14297e4eec80feed91a54123427f~MFX0PT2i92639926399euoutp02L for ; Tue, 5 May 2020 08:46:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20200505084635euoutp029acb14297e4eec80feed91a54123427f~MFX0PT2i92639926399euoutp02L DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668395; bh=B21ieA9YMhUmpiZXxj4FSZPViD0ahaYsrF+5TUs6jmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aN+n9AU0VoTdy0wLfZkU2wII1OVNcc+cenIlZU+s0RwUN/ecsTBUtn5NBHgVOI8mP d6VPBl66sy37JwE17ywyjCTX9Zgm4s4M0sblV/LuwHXf4YDqMU85pVH/KFfdjusOcY 7PBHznx6MJLhE+YeYZniPPmL5FwjJ0mLsiButzvk= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200505084634eucas1p2f13263895e2ba3729986bd6357ca169d~MFXz1gw1L2338223382eucas1p2F; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 90.42.60679.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0~MFXzSEDHK2423624236eucas1p18; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084634eusmtrp126aba354bba07622efd7ab30120ded8d~MFXzRS61A0942309423eusmtrp1j; Tue, 5 May 2020 08:46:34 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-4a-5eb127eab0cc Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4D.21.07950.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084633eusmtip1d32281152fa44131a67ab45c0c0a5134~MFXyomUX20309503095eusmtip1w; Tue, 5 May 2020 08:46:33 +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 v3 18/25] drm: rcar-du: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:46:07 +0200 Message-Id: <20200505084614.30424-18-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200505084614.30424-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSe0hTYRztu3f37ipOrtP0Q0Nr9CAhTY24spIkqUsFCv1RCGlLr1N0Uza1 VKJhKs5H+CCbFmHh++18lE7xgTZNGuELLR/TWaDhI2emIprzqv13fud3zu8cPj4C5fdh9kSY NJqRSUURAtyc0/xpU3dh4Vx9wMX83ctUpq4foepVtRi125yNUsN/lnGqvLIXoQo7hNTqaDqg lNlFXGpteAah1IZRjBpqfYNTGXVNGNU0v4RQ1T2TXKpEvY1QXStz2DWSrnpbBej29UIO/To1 H6PVFUqc/rCux+jpdC1CNxQ9o7/vGFA6d6wU0JpxBU6/aKwAtFHt6Gfhb34lmIkIi2Vkrl4P zUNbNLeipsknwzlCBcizTANmBCQvwaSsUk4aMCf4ZBmAZQ3JODusAdhXn4yygxHA3hINfmjp L9cfLEoBLFhqw44sFd9SuSYVTrrBtMW0fYcNmbx3K9PCJELJbRQm/TLdJQhr8i5sf+lgghzy DGxJSTDJeaQX1I02ImyYE6ys60RN2GyPNwxO7NeD5BQXGhNrDhr5wE717AG2hgvaRi6LT8CB 3AwOa3gO4IyumssOGQAOJaoAqxLCCd0WbmqBkudhbasrS3vDlVnVPg1JSzi2aGWi0T2Y0/wK ZWkeTE3hs+qzsEBbcxTb9XUQZTEN9fofgH2fXgCLN5XcLOBU8D+sEIAKYMfEyCViRu4uZR67 yEUSeYxU7BIUKVGDvf81sKNd+whatx91A5IAAgvefWNtAB8TxcrjJN0AEqjAhleyURfA5wWL 4uIZWWSgLCaCkXcDB4IjsON5vJ9/wCfFomgmnGGiGNnhFiHM7BWgSD+y4uPhu5TTjt5715eU P1Ta/cVqcHq5JyTcc+TOcc0NR7/PsqncBJWz61OlU+DVk6ktUVnt7prQ28U1bTvW173H8m7a i4OmV1ulc6ij0HemJyFjpuFnwVAAlM7ZbJ3KmTS62P6WbZxGbBVSjZUz8BQf84fxIVmgwzCu dfor4MhDRW7OqEwu+gcVeaL4WwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJIsWRmVeSWpSXmKPExsVy+t/xu7qv1DfGGay6I2LRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8elaN6NF58Ql7BZfrjxkstj0+BqrxeVdc9gsejZsZbXY +vIdk8XaI3fZLZZt+sNkcfDDE1YHAY8189Yweuz9toDFY3bHTFaPTas62Ty2f3vA6nG/+ziT x+Yl9R63/z1m9ph8Yzmjx+6bDWwefVtWMXp83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl7Fzt1fBfYGKK5OsGxin8XUxcnJICJhInFz5 gBnEFhJYyihxdz43RFxG4uS0BlYIW1jiz7Uuti5GLqCaT4wSd87eYQNJsAkYSnS9hUiICHQy Skzr/sgO4jALtLBILO25DtYuLBAosa/7BJDNwcEioCqxs60aJMwrYCdx7toWJogN8hKrNxwA u4ITKP74EsQCIYFCiQ/nv7NOYORbwMiwilEktbQ4Nz232EivODG3uDQvXS85P3cTIzCath37 uWUHY9e74EOMAhyMSjy8G76ujxNiTSwrrsw9xCjBwawkwrvsx4Y4Id6UxMqq1KL8+KLSnNTi Q4ymQDdNZJYSTc4HRnpeSbyhqaG5haWhubG5sZmFkjhvh8DBGCGB9MSS1OzU1ILUIpg+Jg5O qQbGa+t5C1pub5nEF8C18XKowK6j8Z3vvzgrnmne6rw3UzLh0Prw/tV+c6a4zbpyoeyix9t1 zVMcZicGHdw2JXjv5Hm2e6s+7n2jVOWZGXT41y7X/8b/eVOPftp2/sry255/tK0mKv47XZX9 YW97tP4Ei6PvhJZ3TYya/npHk19fuHloichtzzlb25RYijMSDbWYi4oTAS4gPqG8AgAA X-CMS-MailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-Msg-Generator: CA X-RootMTR: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 References: <20200505083926.28503-1-m.szyprowski@samsung.com> <20200505084614.30424-1-m.szyprowski@samsung.com> Cc: Bartlomiej Zolnierkiewicz , David Airlie , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Kieran Bingham , Laurent Pinchart , Daniel Vetter , Mauro Carvalho Chehab , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" The Documentation/DMA-API-HOWTO.txt states that dma_map_sg returns the numer of the created entries in the DMA address space. However the subsequent calls to dma_sync_sg_for_{device,cpu} and dma_unmap_sg must be called with the original number of the entries passed to dma_map_sg. The sg_table->nents in turn holds the result of the dma_map_sg call as stated in include/linux/scatterlist.h. A common mistake was to ignore a result of the dma_map_sg function and don't use the sg_table->orig_nents at all. To avoid such issues, lets use common dma-mapping wrappers operating directly on the struct sg_table objects and adjust references to the nents and orig_nents respectively. Signed-off-by: Marek Szyprowski --- For more information, see '[PATCH v3 00/25] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lkml.org/lkml/2020/5/5/187 --- drivers/media/platform/vsp1/vsp1_drm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a4a45d6..8a2624b 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -912,8 +912,9 @@ int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) * skip cache sync. This will need to be revisited when support for * non-coherent buffers will be added to the DU driver. */ - return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + return dma_map_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + return sgt->nents; } EXPORT_SYMBOL_GPL(vsp1_du_map_sg); @@ -921,8 +922,8 @@ void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); - dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); -- 1.9.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF4D9C47254 for ; Tue, 5 May 2020 08:51:35 +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 BD99720675 for ; Tue, 5 May 2020 08:51:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mgTupMi7"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="aN+n9AU0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD99720675 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-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.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=2CZPfP18avjsm03RHhLYxMbs6fqZjdn7vfIXgexQtTw=; b=mgTupMi7HCMeaSXsSa+6E4ClIu 854UjrMTiALNX5/z3w7zOy5GIbGYc4s0q82ckUpgBsrtR7wbDutgnaNAmEu0SuiyPYOqQ/WpWmkzT S2nF8hKgzP1KgBNiGgW3LK7Y9+5AySkA9JP8UL/Hb3JKYuDmUzHM6yLcfr1CrLcJO+OFOfW3X2FCr YnA8bMoPEEiyaYjNn9uW+47QScowdVhOKKcHlIih2UpptIwPesRbsn4fL1gWJHtT3jQpYkjBLBWLk eRA6/YCSOuxtr5WxuailvjCvlWzx/+DNHqLNAXsolXPWtlAYpXq4fA+lDrcr08rQ7a7DTM306eFgx Pv4wXC8A==; 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 1jVtIc-0007OT-OV; Tue, 05 May 2020 08:51:34 +0000 Received: from mailout1.w1.samsung.com ([210.118.77.11]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jVtDo-0000Zt-UG for linux-arm-kernel@lists.infradead.org; Tue, 05 May 2020 08:46:38 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084635euoutp010c457330395e549bce9bf84441058ea0~MFX0PBvHG0379303793euoutp01K for ; Tue, 5 May 2020 08:46:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200505084635euoutp010c457330395e549bce9bf84441058ea0~MFX0PBvHG0379303793euoutp01K DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668395; bh=B21ieA9YMhUmpiZXxj4FSZPViD0ahaYsrF+5TUs6jmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aN+n9AU0VoTdy0wLfZkU2wII1OVNcc+cenIlZU+s0RwUN/ecsTBUtn5NBHgVOI8mP d6VPBl66sy37JwE17ywyjCTX9Zgm4s4M0sblV/LuwHXf4YDqMU85pVH/KFfdjusOcY 7PBHznx6MJLhE+YeYZniPPmL5FwjJ0mLsiButzvk= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200505084634eucas1p2f13263895e2ba3729986bd6357ca169d~MFXz1gw1L2338223382eucas1p2F; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 90.42.60679.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0~MFXzSEDHK2423624236eucas1p18; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084634eusmtrp126aba354bba07622efd7ab30120ded8d~MFXzRS61A0942309423eusmtrp1j; Tue, 5 May 2020 08:46:34 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-4a-5eb127eab0cc Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4D.21.07950.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084633eusmtip1d32281152fa44131a67ab45c0c0a5134~MFXyomUX20309503095eusmtip1w; Tue, 5 May 2020 08:46:33 +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 v3 18/25] drm: rcar-du: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:46:07 +0200 Message-Id: <20200505084614.30424-18-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200505084614.30424-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSe0hTYRztu3f37ipOrtP0Q0Nr9CAhTY24spIkqUsFCv1RCGlLr1N0Uza1 VKJhKs5H+CCbFmHh++18lE7xgTZNGuELLR/TWaDhI2emIprzqv13fud3zu8cPj4C5fdh9kSY NJqRSUURAtyc0/xpU3dh4Vx9wMX83ctUpq4foepVtRi125yNUsN/lnGqvLIXoQo7hNTqaDqg lNlFXGpteAah1IZRjBpqfYNTGXVNGNU0v4RQ1T2TXKpEvY1QXStz2DWSrnpbBej29UIO/To1 H6PVFUqc/rCux+jpdC1CNxQ9o7/vGFA6d6wU0JpxBU6/aKwAtFHt6Gfhb34lmIkIi2Vkrl4P zUNbNLeipsknwzlCBcizTANmBCQvwaSsUk4aMCf4ZBmAZQ3JODusAdhXn4yygxHA3hINfmjp L9cfLEoBLFhqw44sFd9SuSYVTrrBtMW0fYcNmbx3K9PCJELJbRQm/TLdJQhr8i5sf+lgghzy DGxJSTDJeaQX1I02ImyYE6ys60RN2GyPNwxO7NeD5BQXGhNrDhr5wE717AG2hgvaRi6LT8CB 3AwOa3gO4IyumssOGQAOJaoAqxLCCd0WbmqBkudhbasrS3vDlVnVPg1JSzi2aGWi0T2Y0/wK ZWkeTE3hs+qzsEBbcxTb9XUQZTEN9fofgH2fXgCLN5XcLOBU8D+sEIAKYMfEyCViRu4uZR67 yEUSeYxU7BIUKVGDvf81sKNd+whatx91A5IAAgvefWNtAB8TxcrjJN0AEqjAhleyURfA5wWL 4uIZWWSgLCaCkXcDB4IjsON5vJ9/wCfFomgmnGGiGNnhFiHM7BWgSD+y4uPhu5TTjt5715eU P1Ta/cVqcHq5JyTcc+TOcc0NR7/PsqncBJWz61OlU+DVk6ktUVnt7prQ28U1bTvW173H8m7a i4OmV1ulc6ij0HemJyFjpuFnwVAAlM7ZbJ3KmTS62P6WbZxGbBVSjZUz8BQf84fxIVmgwzCu dfor4MhDRW7OqEwu+gcVeaL4WwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJIsWRmVeSWpSXmKPExsVy+t/xu7qv1DfGGay6I2LRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8elaN6NF58Ql7BZfrjxkstj0+BqrxeVdc9gsejZsZbXY +vIdk8XaI3fZLZZt+sNkcfDDE1YHAY8189Yweuz9toDFY3bHTFaPTas62Ty2f3vA6nG/+ziT x+Yl9R63/z1m9ph8Yzmjx+6bDWwefVtWMXp83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl7Fzt1fBfYGKK5OsGxin8XUxcnJICJhInFz5 gBnEFhJYyihxdz43RFxG4uS0BlYIW1jiz7Uuti5GLqCaT4wSd87eYQNJsAkYSnS9hUiICHQy Skzr/sgO4jALtLBILO25DtYuLBAosa/7BJDNwcEioCqxs60aJMwrYCdx7toWJogN8hKrNxwA u4ITKP74EsQCIYFCiQ/nv7NOYORbwMiwilEktbQ4Nz232EivODG3uDQvXS85P3cTIzCath37 uWUHY9e74EOMAhyMSjy8G76ujxNiTSwrrsw9xCjBwawkwrvsx4Y4Id6UxMqq1KL8+KLSnNTi Q4ymQDdNZJYSTc4HRnpeSbyhqaG5haWhubG5sZmFkjhvh8DBGCGB9MSS1OzU1ILUIpg+Jg5O qQbGa+t5C1pub5nEF8C18XKowK6j8Z3vvzgrnmne6rw3UzLh0Prw/tV+c6a4zbpyoeyix9t1 zVMcZicGHdw2JXjv5Hm2e6s+7n2jVOWZGXT41y7X/8b/eVOPftp2/sry255/tK0mKv47XZX9 YW97tP4Ei6PvhJZ3TYya/npHk19fuHloichtzzlb25RYijMSDbWYi4oTAS4gPqG8AgAA X-CMS-MailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-Msg-Generator: CA X-RootMTR: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 References: <20200505083926.28503-1-m.szyprowski@samsung.com> <20200505084614.30424-1-m.szyprowski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200505_014637_128138_1A62DC26 X-CRM114-Status: GOOD ( 13.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bartlomiej Zolnierkiewicz , David Airlie , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Kieran Bingham , Laurent Pinchart , Daniel Vetter , Mauro Carvalho Chehab , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Documentation/DMA-API-HOWTO.txt states that dma_map_sg returns the numer of the created entries in the DMA address space. However the subsequent calls to dma_sync_sg_for_{device,cpu} and dma_unmap_sg must be called with the original number of the entries passed to dma_map_sg. The sg_table->nents in turn holds the result of the dma_map_sg call as stated in include/linux/scatterlist.h. A common mistake was to ignore a result of the dma_map_sg function and don't use the sg_table->orig_nents at all. To avoid such issues, lets use common dma-mapping wrappers operating directly on the struct sg_table objects and adjust references to the nents and orig_nents respectively. Signed-off-by: Marek Szyprowski --- For more information, see '[PATCH v3 00/25] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lkml.org/lkml/2020/5/5/187 --- drivers/media/platform/vsp1/vsp1_drm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a4a45d6..8a2624b 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -912,8 +912,9 @@ int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) * skip cache sync. This will need to be revisited when support for * non-coherent buffers will be added to the DU driver. */ - return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + return dma_map_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + return sgt->nents; } EXPORT_SYMBOL_GPL(vsp1_du_map_sg); @@ -921,8 +922,8 @@ void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); - dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AEB4DC4725C for ; Tue, 5 May 2020 08:47:12 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 79EFF206CC for ; Tue, 5 May 2020 08:47:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="aN+n9AU0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 79EFF206CC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=samsung.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4316C6E5A4; Tue, 5 May 2020 08:46:45 +0000 (UTC) Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id C3A916E57A for ; Tue, 5 May 2020 08:46:36 +0000 (UTC) Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084635euoutp0132143e943fc9ff8b54807b3dc48a97bf~MFX0OSIX50374903749euoutp01T for ; Tue, 5 May 2020 08:46:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200505084635euoutp0132143e943fc9ff8b54807b3dc48a97bf~MFX0OSIX50374903749euoutp01T DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668395; bh=B21ieA9YMhUmpiZXxj4FSZPViD0ahaYsrF+5TUs6jmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aN+n9AU0VoTdy0wLfZkU2wII1OVNcc+cenIlZU+s0RwUN/ecsTBUtn5NBHgVOI8mP d6VPBl66sy37JwE17ywyjCTX9Zgm4s4M0sblV/LuwHXf4YDqMU85pVH/KFfdjusOcY 7PBHznx6MJLhE+YeYZniPPmL5FwjJ0mLsiButzvk= Received: from eusmges2new.samsung.com (unknown [203.254.199.244]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200505084634eucas1p2f13263895e2ba3729986bd6357ca169d~MFXz1gw1L2338223382eucas1p2F; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges2new.samsung.com (EUCPMTA) with SMTP id 90.42.60679.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0~MFXzSEDHK2423624236eucas1p18; Tue, 5 May 2020 08:46:34 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084634eusmtrp126aba354bba07622efd7ab30120ded8d~MFXzRS61A0942309423eusmtrp1j; Tue, 5 May 2020 08:46:34 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-4a-5eb127eab0cc Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 4D.21.07950.AE721BE5; Tue, 5 May 2020 09:46:34 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084633eusmtip1d32281152fa44131a67ab45c0c0a5134~MFXyomUX20309503095eusmtip1w; Tue, 5 May 2020 08:46:33 +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 v3 18/25] drm: rcar-du: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:46:07 +0200 Message-Id: <20200505084614.30424-18-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200505084614.30424-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSe0hTYRztu3f37ipOrtP0Q0Nr9CAhTY24spIkqUsFCv1RCGlLr1N0Uza1 VKJhKs5H+CCbFmHh++18lE7xgTZNGuELLR/TWaDhI2emIprzqv13fud3zu8cPj4C5fdh9kSY NJqRSUURAtyc0/xpU3dh4Vx9wMX83ctUpq4foepVtRi125yNUsN/lnGqvLIXoQo7hNTqaDqg lNlFXGpteAah1IZRjBpqfYNTGXVNGNU0v4RQ1T2TXKpEvY1QXStz2DWSrnpbBej29UIO/To1 H6PVFUqc/rCux+jpdC1CNxQ9o7/vGFA6d6wU0JpxBU6/aKwAtFHt6Gfhb34lmIkIi2Vkrl4P zUNbNLeipsknwzlCBcizTANmBCQvwaSsUk4aMCf4ZBmAZQ3JODusAdhXn4yygxHA3hINfmjp L9cfLEoBLFhqw44sFd9SuSYVTrrBtMW0fYcNmbx3K9PCJELJbRQm/TLdJQhr8i5sf+lgghzy DGxJSTDJeaQX1I02ImyYE6ys60RN2GyPNwxO7NeD5BQXGhNrDhr5wE717AG2hgvaRi6LT8CB 3AwOa3gO4IyumssOGQAOJaoAqxLCCd0WbmqBkudhbasrS3vDlVnVPg1JSzi2aGWi0T2Y0/wK ZWkeTE3hs+qzsEBbcxTb9XUQZTEN9fofgH2fXgCLN5XcLOBU8D+sEIAKYMfEyCViRu4uZR67 yEUSeYxU7BIUKVGDvf81sKNd+whatx91A5IAAgvefWNtAB8TxcrjJN0AEqjAhleyURfA5wWL 4uIZWWSgLCaCkXcDB4IjsON5vJ9/wCfFomgmnGGiGNnhFiHM7BWgSD+y4uPhu5TTjt5715eU P1Ta/cVqcHq5JyTcc+TOcc0NR7/PsqncBJWz61OlU+DVk6ktUVnt7prQ28U1bTvW173H8m7a i4OmV1ulc6ij0HemJyFjpuFnwVAAlM7ZbJ3KmTS62P6WbZxGbBVSjZUz8BQf84fxIVmgwzCu dfor4MhDRW7OqEwu+gcVeaL4WwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJIsWRmVeSWpSXmKPExsVy+t/xu7qv1DfGGay6I2LRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8elaN6NF58Ql7BZfrjxkstj0+BqrxeVdc9gsejZsZbXY +vIdk8XaI3fZLZZt+sNkcfDDE1YHAY8189Yweuz9toDFY3bHTFaPTas62Ty2f3vA6nG/+ziT x+Yl9R63/z1m9ph8Yzmjx+6bDWwefVtWMXp83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl7Fzt1fBfYGKK5OsGxin8XUxcnJICJhInFz5 gBnEFhJYyihxdz43RFxG4uS0BlYIW1jiz7Uuti5GLqCaT4wSd87eYQNJsAkYSnS9hUiICHQy Skzr/sgO4jALtLBILO25DtYuLBAosa/7BJDNwcEioCqxs60aJMwrYCdx7toWJogN8hKrNxwA u4ITKP74EsQCIYFCiQ/nv7NOYORbwMiwilEktbQ4Nz232EivODG3uDQvXS85P3cTIzCath37 uWUHY9e74EOMAhyMSjy8G76ujxNiTSwrrsw9xCjBwawkwrvsx4Y4Id6UxMqq1KL8+KLSnNTi Q4ymQDdNZJYSTc4HRnpeSbyhqaG5haWhubG5sZmFkjhvh8DBGCGB9MSS1OzU1ILUIpg+Jg5O qQbGa+t5C1pub5nEF8C18XKowK6j8Z3vvzgrnmne6rw3UzLh0Prw/tV+c6a4zbpyoeyix9t1 zVMcZicGHdw2JXjv5Hm2e6s+7n2jVOWZGXT41y7X/8b/eVOPftp2/sry255/tK0mKv47XZX9 YW97tP4Ei6PvhJZ3TYya/npHk19fuHloichtzzlb25RYijMSDbWYi4oTAS4gPqG8AgAA X-CMS-MailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-Msg-Generator: CA X-RootMTR: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084634eucas1p1e0ea160dd77afbf6d2f7e6154ded40d0 References: <20200505083926.28503-1-m.szyprowski@samsung.com> <20200505084614.30424-1-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: Bartlomiej Zolnierkiewicz , David Airlie , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Kieran Bingham , Laurent Pinchart , Mauro Carvalho Chehab , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The Documentation/DMA-API-HOWTO.txt states that dma_map_sg returns the numer of the created entries in the DMA address space. However the subsequent calls to dma_sync_sg_for_{device,cpu} and dma_unmap_sg must be called with the original number of the entries passed to dma_map_sg. The sg_table->nents in turn holds the result of the dma_map_sg call as stated in include/linux/scatterlist.h. A common mistake was to ignore a result of the dma_map_sg function and don't use the sg_table->orig_nents at all. To avoid such issues, lets use common dma-mapping wrappers operating directly on the struct sg_table objects and adjust references to the nents and orig_nents respectively. Signed-off-by: Marek Szyprowski --- For more information, see '[PATCH v3 00/25] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lkml.org/lkml/2020/5/5/187 --- drivers/media/platform/vsp1/vsp1_drm.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index a4a45d6..8a2624b 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -912,8 +912,9 @@ int vsp1_du_map_sg(struct device *dev, struct sg_table *sgt) * skip cache sync. This will need to be revisited when support for * non-coherent buffers will be added to the DU driver. */ - return dma_map_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + return dma_map_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + return sgt->nents; } EXPORT_SYMBOL_GPL(vsp1_du_map_sg); @@ -921,8 +922,8 @@ void vsp1_du_unmap_sg(struct device *dev, struct sg_table *sgt) { struct vsp1_device *vsp1 = dev_get_drvdata(dev); - dma_unmap_sg_attrs(vsp1->bus_master, sgt->sgl, sgt->nents, - DMA_TO_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_sgtable_attrs(vsp1->bus_master, sgt, DMA_TO_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); } EXPORT_SYMBOL_GPL(vsp1_du_unmap_sg); -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel