From patchwork Wed May 13 13:32:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 209826 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=-10.0 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 D1967C2D116 for ; Wed, 13 May 2020 13:33:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BC1520829 for ; Wed, 13 May 2020 13:33:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="t6OWEL3o" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388254AbgEMNdo (ORCPT ); Wed, 13 May 2020 09:33:44 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:59096 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388134AbgEMNd1 (ORCPT ); Wed, 13 May 2020 09:33:27 -0400 Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200513133325euoutp018c6e83a18992853809dc2695ce0e96eb~OmcieFbwD2196121961euoutp01B for ; Wed, 13 May 2020 13:33:25 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200513133325euoutp018c6e83a18992853809dc2695ce0e96eb~OmcieFbwD2196121961euoutp01B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1589376805; bh=vazhLbBFeBfCMmXGmU9SyqWVzV61/EYfNXSyQFwWX60=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t6OWEL3oAAP6MKLigohfRj18mA1iVSeQ2UvOkZufhp2vXEiakv/co/1SEyhZN4ZGV jJ4aJJr+Dwval3uY7V9/mvgOVhhMrGhE608ey5Quc9+/ER1TMYiL7euED8NxNNb0m+ ktp9wjSs4UhLuR7c2FMohGvSKWq0ctdjj488BkdU= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200513133324eucas1p2ee28c7c8b40096d69e61ccb40869df42~Omch_6t3M0359403594eucas1p23; Wed, 13 May 2020 13:33:24 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id B5.E8.60698.427FBBE5; Wed, 13 May 2020 14:33:24 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200513133324eucas1p25dc380046c516ca8f07677ed14f93e63~Omchmc1d82378623786eucas1p2K; Wed, 13 May 2020 13:33:24 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20200513133324eusmtrp2b236c8e390a3dcbb4effa40b7a2b4706~Omchld4Np1338613386eusmtrp2x; Wed, 13 May 2020 13:33:24 +0000 (GMT) X-AuditID: cbfec7f5-a0fff7000001ed1a-09-5ebbf724383e Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id C8.2A.08375.427FBBE5; Wed, 13 May 2020 14:33:24 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200513133323eusmtip151829cf8f1691cbe8793eb3d45b0170f~Omcg8hyPy3222032220eusmtip1I; Wed, 13 May 2020 13:33:23 +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 , linux-media@vger.kernel.org Subject: [PATCH v5 37/38] media: pci: fix common ALSA DMA-mapping related codes Date: Wed, 13 May 2020 15:32:44 +0200 Message-Id: <20200513133245.6408-37-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: H4sIAAAAAAAAA0WSa0hTYRjHec/Zzs6Ws+OUfLVIGyolpJkWJzRLiDj4IYyKIMiaeVDJW5uz LEJJvM0L5SDFpEQky6nTOaepectbWktU5t3mJS3FlKZWMrVtp+zb73me//99Lrw4KqhlO+IR 0XG0OFoUKcR4LE3X709HXX42Bh+rSjlBZmvfI2R1vpJN7mieoOTQ+gpGvlZ0ImRRiy+5NjSN kKpZHZscbCjEyKyqWjZZ0THJIV+qjAjZtjrHPsunyp+XA+rtRhGLUpVlYFTdhp5Nfc7sRqia kkRqfHsWpeQjpYBqHE3CqBx1GaAMqoNBe67x/ELpyIh4Wuzpf5MX3jsyh8VmwnstW/NYEvhh JwNcHBI+8ItBgcoADxcQrwDMny5mMcEagOrRJsysEhAGAJcWEmUAtziy5JcYTSmAX4u3sF1D yXK7xYARXlC2LLOwHZECYE+2lVmEErMILFLqLAVb4iLMq5YjZmYRrvBZRgnLzHziNMxsamAx 8zlBRVUramauKb840WIZDxJdHDgw2YMxonOwV9b012ALF7vVHIYPwJ03LxDGkAzgtLaCwwRZ AA4+ygeMyhdOaDcx83IocQQqGzyZPQOgtk7IoDUcWbYxi1ET5mryUCbNh+mpAuYNN1jQXbnb ta1/AGWYgjtpExzmQO8ATM6oxx4Dp4L/vYoAKAP2tFQSFUZLvKPpux4SUZREGh3mcSsmSgVM n6lvu3u9HjQbQ9oBgQOhFV8/3BgsYIviJQlR7QDiqNCOf0FpSvFDRQn3aXHMDbE0kpa0g/04 S2jP9y7+dl1AhIni6Ns0HUuL/1URnOuYBNxOVp26Iw3J3Vr12Rfkr3G2XnCChvnQyDNDe/Uz 6X3GskCRTh9ojdpTlc0prTUP3cZSrziUfyBt6MNuvVZqbyN7fpRyVRSGj4ypY1bwQ5tyTkCn Ytzv/K/htAfuWTLfZK8Z5XdnTYcu9riiIoe3eXmpeHtqqp979eO4i/NTByFLEi7yckfFEtEf 1Huf3kgDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprBIsWRmVeSWpSXmKPExsVy+t/xu7oq33fHGaydImPRe+4kk8XGGetZ Lf5vm8hsceXrezaLlauPMlks2G9t8eXKQyaLTY+vsVpc3jWHzaJnw1ZWi7VH7rJbLNv0h8ni 4IcnrA68HmvmrWH02PttAYvHplWdbB7bvz1g9bjffZzJY/OSeo/b/x4ze0y+sZzRY/fNBjaP vi2rGD0+b5IL4I7SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQzNDaPtTIyVdK3s0lJzcks Sy3St0vQyzh14wlbQbdExf6/z9gaGD+JdDFycEgImEj0TA7uYuTiEBJYyihx8c5dpi5GTqC4 jMTJaQ2sELawxJ9rXWwQRZ8YJX69OcoOkmATMJToeguREBHoZJSY1v2RHcRhFnjNJNG6aw0b SJWwgL/E7zPNYKNYBFQlZncuYQGxeQVsJbr37GKBWCEvsXrDAWYQmxMo/urOfrC4kEC+xN7F +9gmMPItYGRYxSiSWlqcm55bbKhXnJhbXJqXrpecn7uJERgr24793LyD8dLG4EOMAhyMSjy8 Frd2xwmxJpYVV+YeYpTgYFYS4fVbDxTiTUmsrEotyo8vKs1JLT7EaAp01ERmKdHkfGAc55XE G5oamltYGpobmxubWSiJ83YIHIwREkhPLEnNTk0tSC2C6WPi4JRqYGzY9lF2VW8iE9fRN0vl X9WZZWmXbApdP5uj+duFm3s6+VT3ht46n5M5zdQ4/3JIgvv3wmmnrVrmy0j5bdV3PflgbkdN 4gMhyVmRWZu2FSyYIDJ97R6pzsPePRyK3RfnL2lQEF+YZ1e5ROWpxWKVSXwdy/2v28XkPrdi 9TYKPntQJuNvc4SUtRJLcUaioRZzUXEiALcYtIOrAgAA X-CMS-MailID: 20200513133324eucas1p25dc380046c516ca8f07677ed14f93e63 X-Msg-Generator: CA X-RootMTR: 20200513133324eucas1p25dc380046c516ca8f07677ed14f93e63 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200513133324eucas1p25dc380046c516ca8f07677ed14f93e63 References: <20200513132114.6046-1-m.szyprowski@samsung.com> <20200513133245.6408-1-m.szyprowski@samsung.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@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 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. Adapt the code to obey those rules. 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/media/pci/cx23885/cx23885-alsa.c | 2 +- drivers/media/pci/cx25821/cx25821-alsa.c | 2 +- drivers/media/pci/cx88/cx88-alsa.c | 2 +- drivers/media/pci/saa7134/saa7134-alsa.c | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/media/pci/cx23885/cx23885-alsa.c b/drivers/media/pci/cx23885/cx23885-alsa.c index df44ed7..3f366e4 100644 --- a/drivers/media/pci/cx23885/cx23885-alsa.c +++ b/drivers/media/pci/cx23885/cx23885-alsa.c @@ -129,7 +129,7 @@ static int cx23885_alsa_dma_unmap(struct cx23885_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; } diff --git a/drivers/media/pci/cx25821/cx25821-alsa.c b/drivers/media/pci/cx25821/cx25821-alsa.c index 3016164..c40304d 100644 --- a/drivers/media/pci/cx25821/cx25821-alsa.c +++ b/drivers/media/pci/cx25821/cx25821-alsa.c @@ -193,7 +193,7 @@ static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; } diff --git a/drivers/media/pci/cx88/cx88-alsa.c b/drivers/media/pci/cx88/cx88-alsa.c index 7d7acee..3c6fe6c 100644 --- a/drivers/media/pci/cx88/cx88-alsa.c +++ b/drivers/media/pci/cx88/cx88-alsa.c @@ -332,7 +332,7 @@ static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev) if (!buf->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, PCI_DMA_FROMDEVICE); buf->sglen = 0; return 0; diff --git a/drivers/media/pci/saa7134/saa7134-alsa.c b/drivers/media/pci/saa7134/saa7134-alsa.c index 544ca57..398c47f 100644 --- a/drivers/media/pci/saa7134/saa7134-alsa.c +++ b/drivers/media/pci/saa7134/saa7134-alsa.c @@ -313,7 +313,7 @@ static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev) if (!dma->sglen) return 0; - dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE); + dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->nr_pages, PCI_DMA_FROMDEVICE); dma->sglen = 0; return 0; }