From patchwork Tue May 5 08:45:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 11528517 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 9FDC014C0 for ; Tue, 5 May 2020 08:48:10 +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 72D07206E6 for ; Tue, 5 May 2020 08:48:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="RGRGMyzD"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="dnWYXk7p" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 72D07206E6 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+patchwork-linux-arm=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=VtAZeWTvP5mp3+814akcjDu6PrHJ1cfGB8qBrk42dzg=; b=RGRGMyzDOxSqEhBe7lrDCHFjGb P/7g4weYLk7g2u3G1SfjhaRjhbptvof6vpAXgtjONvN0QkkwRUMKUr3kFQX3ag4fP3O1/w297MR86 7M+HMwSVA0qsDIve5M1bN55VtQsWwt1cfqM9alOZyXBCfYnttd4Nj93JH6g87T/vcnMbhr3K0s1qp K9i8mvG6lNpVLT8cXhhW+7Qyl/nahzW/xRYsiarfyeg8oqA2dSo9CkNh1x5uUeIcCDrR6QSHxpEeo n7uP4VhG0Kd3H3fR+id1Qs3OgFt057NYJKMIakYzFfNAdxMRoXNa3AvKsGTI4cXOtX/EVsCyBjSG7 NMV3aO5g==; 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 1jVtFE-00023r-P0; Tue, 05 May 2020 08:48:04 +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 1jVtDh-0000Sg-AV for linux-arm-kernel@lists.infradead.org; Tue, 05 May 2020 08:46:31 +0000 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200505084627euoutp010734b37c729cdcdef37a2709aa30a74e~MFXtTcYdy0374903749euoutp01H for ; Tue, 5 May 2020 08:46:27 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200505084627euoutp010734b37c729cdcdef37a2709aa30a74e~MFXtTcYdy0374903749euoutp01H DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1588668388; bh=smP0MqC10gkGUsqZ8FO+WM7ssHhztI08IUYBhFg1Gms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dnWYXk7pNLW4nAWdQhAv06D0Zh6dFRLsNRbQnkybhMmdvQfmrqZx82fi9NZxV62nq XjtAak0CVkAGun9KD41WLExMmymzo3VLMexGbau7mWKNvfrRMx7Eo+X6SCVovjtA0i gxFEQkiOnd1/YffDhUWe2N9240/8FsELvn884uMg= Received: from eusmges1new.samsung.com (unknown [203.254.199.242]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20200505084627eucas1p16fb638775da4293e682737af349058d9~MFXs_3_wM1830218302eucas1p1J; Tue, 5 May 2020 08:46:27 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges1new.samsung.com (EUCPMTA) with SMTP id D1.CF.61286.3E721BE5; Tue, 5 May 2020 09:46:27 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20200505084627eucas1p119c77fbf28532627f27382efc51b0aaa~MFXssRhHQ1830218302eucas1p1H; Tue, 5 May 2020 08:46:27 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200505084627eusmtrp10c9da49bd6926c2c2da3fe2b52dc42a6~MFXsrjgJk0942309423eusmtrp1P; Tue, 5 May 2020 08:46:27 +0000 (GMT) X-AuditID: cbfec7f2-ef1ff7000001ef66-9b-5eb127e32c26 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id D3.14.08375.3E721BE5; Tue, 5 May 2020 09:46:27 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200505084626eusmtip16cfbd7c9a086f9c1c9c8da7309eeacb0~MFXr-vkJj0580805808eusmtip16; Tue, 5 May 2020 08:46:26 +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 06/25] drm: exynos: fix common struct sg_table related issues Date: Tue, 5 May 2020 10:45:55 +0200 Message-Id: <20200505084614.30424-6-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: H4sIAAAAAAAAA0VSbUgTYRznubudt+HqmoYPGiqLkiQ1yw8HliX44YigkKKQsmYeKjqVzflW 1Eo0mxpTMYel2BA1312yxEqnqLOGs1R0qaljOjKyJJ2pkLXzrL793v78/s+fh0BFnTxPIiE5 jZElS5LEuADTD26OBNj82qOPLU4cpIrMbxGqXdPKo37ri1Fq3PEdp543DiBUyZwao6p7QqnP sx8wam3cilA62wSPGut6ilOakW6Eau7/5EL1rizwKE3pEn5mL91U1QToN+vVGP1yfZ5HzxUY EfpFzV16etuG0qWWOkC/+qjE6UcdDYBe1XlfEEQJTsYySQnpjCwo7IYg3lAmSVWTmfZKO1CC SaEKEAQkQ+BmdaAKCAgRWQ9gSf8QUAG+k6w5ifYoZ6wC2Dj5eMdgB6x2JY8z6gAcdrQgHHFO tK4pETaFk8FQtazCWexO5gI4VOTKhlBSh8KCSi3KdruRkdC0GMFmMPIQ1NY+Q1ksJE9Bu3oY 5dp8YGObYQfzyTBoG53BOd3sAk3fAjkcAQcNlRiH3eAXY4cLhw9AU2khxvZCMgdAq7nZhSOF AI7d1+y+JxTOmLdwdiGUPAJbu4I4ORzmbP/CuBvtgZblfayMOmGJvhzlZCHMzxNx6cOwwtjy r7b3/eju+jTMteQA7j4DABpqNhA18Kn4X1YNQAPwYBRyaRwjD05mMgLlEqlckRwXeDNFqgPO /2TaNv7oBI7RmD5AEkDsKryy2hot4knS5VnSPgAJVOwurN1oixYJYyVZ2Yws5bpMkcTI+4AX gYk9hCe0S9dEZJwkjUlkmFRG9tdFCL6nEkj5inMe0uykSkfGQ966qOxSdH1OjKJZ62YWlD/J ZI5r8u6l93uFRYWf/jlWu72V2J/vJ+wFPYNR6uk7726/Jld8HasL2d3EbMxGUNzS/geXxyOk dWbR1SlvU7HV99b416huXYFlShPizj87FTAsM0bqE+Zz24ICqhQX/Wc058WYPF4S7I/K5JI/ MctFXEsDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprDIsWRmVeSWpSXmKPExsVy+t/xu7qP1TfGGUxcyWPRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMllMuj+BxWLBfmuLF/cuslh8ufKQyWLT42usFpd3zWGzmHF+H5PF 2iN32S0OfnjCajFj8ks2B36PNfPWMHrs/baAxWP7twesHve7jzN5bF5S73H732Nmj8k3ljN6 7L7ZwObRt2UVo8fnTXIBXFF6NkX5pSWpChn5xSW2StGGFkZ6hpYWekYmlnqGxuaxVkamSvp2 NimpOZllqUX6dgl6GQemJhZMEKh4NvcZYwPjdd4uRk4OCQETiYfPGlhBbCGBpYwSH/+IQ8Rl JE5Og4hLCAhL/LnWxdbFyAVU84lR4t/MNrAEm4ChRNdbiISIQCejxLTuj+wgDrPAHmaJJ+/O s4FUCQsESOx/dJsZxGYRUJVYtGwhmM0rYCvxbMJZZogV8hKrNxwAszkF7CQeX7rDBnFSocSH 899ZJzDyLWBkWMUoklpanJueW2yoV5yYW1yal66XnJ+7iREYM9uO/dy8g/HSxuBDjAIcjEo8 vBGf18cJsSaWFVfmHmKU4GBWEuFd9mNDnBBvSmJlVWpRfnxRaU5q8SFGU6CjJjJLiSbnA+M5 ryTe0NTQ3MLS0NzY3NjMQkmct0PgYIyQQHpiSWp2ampBahFMHxMHp1QDo/bf+M/L5l4945jW /nRS2P9nt+3tUgJjO+27p57UWOc3M21Si89fFpGub4wey5MdnKIN7pkdeVM+k3vxi9/yP/a8 6L17QqVmicqxNb8j9PdHiEYz7ne//90vePWbC7mau5Zx2fltNoywdeu1STq+cdpV72sav24c Vvtj//FNd7FiTc2TPZtCfiuxFGckGmoxFxUnAgCt+I6OrwIAAA== X-CMS-MailID: 20200505084627eucas1p119c77fbf28532627f27382efc51b0aaa X-Msg-Generator: CA X-RootMTR: 20200505084627eucas1p119c77fbf28532627f27382efc51b0aaa X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200505084627eucas1p119c77fbf28532627f27382efc51b0aaa 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_014629_507546_59A081E6 X-CRM114-Status: GOOD ( 14.28 ) 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 ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [210.118.77.11 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [210.118.77.11 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -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_AU Message has a valid DKIM or DK signature from author's domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender 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: linux-samsung-soc@vger.kernel.org, Joonyoung Shim , Bartlomiej Zolnierkiewicz , David Airlie , Seung-Woo Kim , Inki Dae , Daniel Vetter , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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/gpu/drm/exynos/exynos_drm_g2d.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c index fcee33a..6a655d3 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -395,8 +395,8 @@ static void g2d_userptr_put_dma_addr(struct g2d_data *g2d, return; out: - dma_unmap_sg(to_dma_dev(g2d->drm_dev), g2d_userptr->sgt->sgl, - g2d_userptr->sgt->nents, DMA_BIDIRECTIONAL); + dma_unmap_sgtable(to_dma_dev(g2d->drm_dev), g2d_userptr->sgt, + DMA_BIDIRECTIONAL); pages = frame_vector_pages(g2d_userptr->vec); if (!IS_ERR(pages)) { @@ -511,10 +511,9 @@ static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d, g2d_userptr->sgt = sgt; - if (!dma_map_sg(to_dma_dev(g2d->drm_dev), sgt->sgl, sgt->nents, - DMA_BIDIRECTIONAL)) { + ret = dma_map_sgtable(to_dma_dev(g2d->drm_dev), sgt, DMA_BIDIRECTIONAL); + if (ret) { DRM_DEV_ERROR(g2d->dev, "failed to map sgt with dma region.\n"); - ret = -ENOMEM; goto err_sg_free_table; }