From patchwork Tue May 5 08:46:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11528493 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 9EC3714C0 for ; Tue, 5 May 2020 08:47:14 +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 7D5DA206CC for ; Tue, 5 May 2020 08:47:14 +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="D2WL9Exa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D5DA206CC 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 3A1706E5A9; Tue, 5 May 2020 08:46:47 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id D1A026E59F for ; Tue, 5 May 2020 08:46:43 +0000 (UTC) Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084642euoutp01f7862b88e0bd8ff7142c09271b330e9e~MFX64DBcu0374903749euoutp01a for ; Tue, 5 May 2020 08:46:42 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200505084642euoutp01f7862b88e0bd8ff7142c09271b330e9e~MFX64DBcu0374903749euoutp01a DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668402; bh=4Wn9PB2hsUcfeXjKsNb4RnLI8IycXO7vRARzqAzX/lM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D2WL9ExaEHU7RNHlcGQH5Kl5NrGrF7JyPHpGh2z8tw0aRiAGG1at7cknp6YZdVVlV //VSLJMr/oS4JJLp5cddEoOV7JioC0BdyEIIO/COm9W98yfC1x+QkFcKvekvftGsc9 zhXu9WDcmzmOq7aALHHggVlSWQykthpKaC3AC/BY= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200505084637eucas1p2ae80f76e35086405a44f4510d0ab7e90~MFX1t_H5f1348613486eucas1p2m; Tue, 5 May 2020 08:46:37 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id E2.11.60698.CE721BE5; Tue, 5 May 2020 09:46:36 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200505084636eucas1p23a33d0b83ca284692713745d004f93ea~MFX1XHA9E2336923369eucas1p2C; Tue, 5 May 2020 08:46:36 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084636eusmtrp12bf7c85bfcea14cc0211d23f25f7de34~MFX1WPsxX0942509425eusmtrp1Z; Tue, 5 May 2020 08:46:36 +0000 (GMT) X-AuditID: cbfec7f5-a29ff7000001ed1a-4a-5eb127ecdc90 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 0F.14.08375.CE721BE5; Tue, 5 May 2020 09:46:36 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084635eusmtip1a40af7250cf41dbed0f1cc43f8041929~MFX0pbEfv0686606866eusmtip1N; Tue, 5 May 2020 08:46:35 +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 21/25] staging: tegra-vde: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:46:10 +0200 Message-Id: <20200505084614.30424-21-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: H4sIAAAAAAAAA0WSe0hTYRjG+3bOzo7D6WlWfqkoDLIMvKHBJ1Z2++PYHxVoUULW1IOXvLGj lkIk2cWWEy+UOsqGlpp3l2mZl7wsC2XUFFmpM1uKltnFu8zKddT++73P+z48Dx8fiYnH+HZk ZGwCI4uVRksIId7waknrOrWzLtjjT44PUmjf8FBdfg0f/WnIxlBz77IAVfw0AtQ/951AacU1 BHpcoeEhVZsvuqYswtFs/ygPqY0DfNTXdI9AGbVP+ejWrJJAVV3DAlSiNvFQ+4/PfLTUVIgf sKErCysBbWjtxOmWeRVOP1cOC2h1+S2Cbpz/yKfb7lcK6JHb3Tz6ycMr9OBvI0bn6ksB/eJ9 KkEr0qYJOrO+HNAzascT1kHCvWFMdGQSI3Pff14YUfXJJIjXWl6q0+9NBe+EcmBBQsobaoY0 PDOLqTIAO5UuciBc5VkAW1IHMG6YAbB3wSBYd+gLfmKcoxTAstxdG465NAPfvCAoTyj/JifM vIW6DuBrhaWZMaoXh72LXnJAkjbUGThykzXLOLUDjjwY+tdCRO2H/SP3MS7LCVbUvvzHFqu6 UTdEmLMglU3ChR/1gDs6AseVVTjHNvBLd/1aUQfYk5uBc4Y0AEe1VQJuyACw72r+mtsXDmmX CXMjjHKBNU3unHwQVhe14mYZUlZQ/20z198K5jTkYZwsguk3xNy1M1R2V2/Etr/VrfWnobzu JsG9j2Y1tbmFlwWclP/DVACUA1smkY0JZ1ivWOaiGyuNYRNjw91C42LUYPXz9fzunnsGWk0h HYAigcRSdHqmJljMlyaxyTEdAJKYZIuoZLE2WCwKkyanMLK4c7LEaIbtAPYkLrEVeRVNnhVT 4dIE5gLDxDOy9S2PtLBLBc4ezTaeVpsuBCxHnTocZcgb/3A5ZenQd1//wvSJIFg87eO0su1O zrEVXaH3om6q2r7SejCwM/3u130h1u1xHrouzaRfVijrtOCmmHAMm5zfwxxXZmOLj0xdHf5+ Ox30p39tD01IUR1NcQ3InB8TL9kFJo8qthobi26bhk8apguqJTgbIfXcjclY6V9lF92peAMA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJIsWRmVeSWpSXmKPExsVy+t/xu7pv1DfGGexfq2LRe+4kk8XGGetZ Lf5vm8hssefML3aL1R8fM1pc+fqezaJ58Xo2i5WrjzJZLNhvbdEyaxGLxZcrD5ksNj2+xmpx edccNoueDVtZLTq/zGKzWHvkLrvFsk1/mCwOfnjCavFz1zwWB2GPNfPWMHrc23eYxWPvtwUs Hjtn3WX32LSqk81j+7cHrB77565h97jffZzJY/OSeo/b/x4ze0y+sZzRY/fNBjaP3uZ3bB59 W1YxenzeJBfAH6VnU5RfWpKqkJFfXGKrFG1oYaRnaGmhZ2RiqWdobB5rZWSqpG9nk5Kak1mW WqRvl6CXsfbRH/aCczwVG2/YNDBe5Opi5OSQEDCRuDHzI3MXIxeHkMBSRom9Wy8wQiRkJE5O a2CFsIUl/lzrYgOxhQQ+MUpsX1wEYrMJGEp0vQWJc3GICHQySkzr/sgO4jAL3GCRmLvlAztI lbBAuMSrna3MIDaLgKrE/fl3mEBsXgE7iSv35zJDbJCXWL3hAJjNCRR/fOkO1LZCiQ/nv7NO YORbwMiwilEktbQ4Nz232FCvODG3uDQvXS85P3cTIzAatx37uXkH46WNwYcYBTgYlXh4Iz6v jxNiTSwrrsw9xCjBwawkwrvsx4Y4Id6UxMqq1KL8+KLSnNTiQ4ymQEdNZJYSTc4HJoq8knhD U0NzC0tDc2NzYzMLJXHeDoGDMUIC6YklqdmpqQWpRTB9TBycUg2Muko3RMovvHki7CHA3+LV 7JCau4xtg73btAuWW48ZWEicnCnP/519GeOWfb9Wsj02qxK81xllLrHgo3t/gEJfRcCcyv6H /23nKvBUrmv7OVvh6qei/jlc/i5ugmxx5pIbNM9MlTusXBU369HrZCk/BqMK0zLna7puT278 Ov6w1HjxEQONbfFKLMUZiYZazEXFiQDIsp8b3AIAAA== X-CMS-MailID: 20200505084636eucas1p23a33d0b83ca284692713745d004f93ea X-Msg-Generator: CA X-RootMTR: 20200505084636eucas1p23a33d0b83ca284692713745d004f93ea X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084636eucas1p23a33d0b83ca284692713745d004f93ea 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: devel@driverdev.osuosl.org, Bartlomiej Zolnierkiewicz , David Airlie , Greg Kroah-Hartman , linux-media@vger.kernel.org, Jonathan Hunter , Thierry Reding , linux-tegra@vger.kernel.org, Dmitry Osipenko , Mauro Carvalho Chehab , 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" 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/staging/media/tegra-vde/iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/tegra-vde/iommu.c b/drivers/staging/media/tegra-vde/iommu.c index 6af863d..adf8dc7 100644 --- a/drivers/staging/media/tegra-vde/iommu.c +++ b/drivers/staging/media/tegra-vde/iommu.c @@ -36,8 +36,8 @@ int tegra_vde_iommu_map(struct tegra_vde *vde, addr = iova_dma_addr(&vde->iova, iova); - size = iommu_map_sg(vde->domain, addr, sgt->sgl, sgt->nents, - IOMMU_READ | IOMMU_WRITE); + size = iommu_map_sgtable(vde->domain, addr, sgt, + IOMMU_READ | IOMMU_WRITE); if (!size) { __free_iova(&vde->iova, iova); return -ENXIO;