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Wed, 26 Aug 2020 06:35:42 +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 , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6ni?= =?utf-8?q?g?= , Gerd Hoffmann , linux-media@vger.kernel.org Subject: [PATCH v9 26/32] dmabuf: fix common struct sg_table related issues Date: Wed, 26 Aug 2020 08:33:10 +0200 Message-Id: <20200826063316.23486-27-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200826063316.23486-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJKsWRmVeSWpSXmKPExsWy7djPc7r7mdziDb6dMrXoPXeSyWLjjPWs Fm/v72a1+L9tIrPFla/v2SxWrj7KZLFgv7XFs1snmS2+XHnIZLHp8TVWi8u75rBZ9GzYymqx 9shddouDH56wWpy6+5ndgd+j9dJfNo8189Yweuz9toDF4861PWwe2789YPW4332cyWPzknqP 2/8eM3tMvrGc0WP3zQY2j/f7rrJ59G1ZxejxeZNcAG8Ul01Kak5mWWqRvl0CV8b/s2fYCyZI V2xYsJ+pgXGXWBcjJ4eEgIlE27xJTF2MXBxCAisYJf793swM4XxhlHj8aB8bhPOZUWLu9RWM MC0Hd36ASixnlDjbvoodrqVr/0lmkCo2AUOJrrddbCC2iEAro8SJXh6QImaBo8wSt9oXsoAk hAW8Ja6feQtkc3CwCKhKfL0iAGLyCthJzNiTBbFMXmL1hgNgIzmBwse7+8EWSwi8ZJe4vOAp K0SRi8TVV81QtrDEq+Nb2CFsGYn/O+czQTQ0M0o8PLeWHcLpYZS43DQD6h9riTvnfrGBbGYW 0JRYv0sfxJQQcJSYujgBwuSTuPFWEKSYGcictG06M0SYV6KjTQhihprErOPr4LYevHCJGcL2 kJiz5SU0RCcySszZ2ck2gVF+FsKuBYyMqxjFU0uLc9NTi43zUsv1ihNzi0vz0vWS83M3MQIT 2Ol/x7/uYNz3J+kQowAHoxIP7wI213gh1sSy4srcQ4wSHMxKIrxOZ0/HCfGmJFZWpRblxxeV 5qQWH2KU5mBREuc1XvQyVkggPbEkNTs1tSC1CCbLxMEp1cDozm/Y66m+wKi5cftnWbNutU/H Ji3NS9d/x6VxOGltwLJ9T14+/jz3yG7zZtuZBwTtHoVZiRzgW+K9/E3ojc71deXHX6U2XZWe /T/n0vP3MxYfePz5sUvW0vb0K0WuAbX3PKYtDvz/IjemI2OqRdiFlisrtlp+udqzVs1V6Pms Q5vupHnvSD3EqMRSnJFoqMVcVJwIAEYbVdhcAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrFIsWRmVeSWpSXmKPExsVy+t/xe7r7mdziDc6clbDoPXeSyWLjjPWs Fm/v72a1+L9tIrPFla/v2SxWrj7KZLFgv7XFs1snmS2+XHnIZLHp8TVWi8u75rBZ9GzYymqx 9shddouDH56wWpy6+5ndgd+j9dJfNo8189Yweuz9toDF4861PWwe2789YPW4332cyWPzknqP 2/8eM3tMvrGc0WP3zQY2j/f7rrJ59G1ZxejxeZNcAG+Unk1RfmlJqkJGfnGJrVK0oYWRnqGl hZ6RiaWeobF5rJWRqZK+nU1Kak5mWWqRvl2CXsb/s2fYCyZIV2xYsJ+pgXGXWBcjJ4eEgInE wZ0f2LoYuTiEBJYySuxbdIkZIiEjcXJaAyuELSzx51oXG4gtJPCJUeLBdHcQm03AUKLrbRdY s4hAJ6PEtO6P7CAOs8BZZolfz5ezg1QJC3hLXD/zlqWLkYODRUBV4usVARCTV8BOYsaeLIj5 8hKrNxwA28sJFD7e3Q+1y1bi9NoZzBMY+RYwMqxiFEktLc5Nzy020itOzC0uzUvXS87P3cQI jKdtx35u2cHY9S74EKMAB6MSD+8CNtd4IdbEsuLK3EOMEhzMSiK8TmdPxwnxpiRWVqUW5ccX leakFh9iNAU6aSKzlGhyPjDW80riDU0NzS0sDc2NzY3NLJTEeTsEDsYICaQnlqRmp6YWpBbB 9DFxcEo1MM7aek1sJU/BohT91cnpITnCjD/3uB9wleWcmPA+3OHHpOqwhUJ1t5TXb5nUI31g 895z/88n3bo27VpasNihLJ8dhVOzXi3+vYJn89FpMUFvdqvNXMph8M2G/+3eNgeOG2LXtvdf 5Y4/HLvfQLPJU+K4fnP/JSlGvrxErUqGvM3Pu/8m/VEOuK7EUpyRaKjFXFScCABe198UvQIA AA== X-CMS-MailID: 20200826063543eucas1p1c2fde4802f125f25caa02f4453b8a284 X-Msg-Generator: CA X-RootMTR: 20200826063543eucas1p1c2fde4802f125f25caa02f4453b8a284 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200826063543eucas1p1c2fde4802f125f25caa02f4453b8a284 References: <20200826063316.23486-1-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 the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. Signed-off-by: Marek Szyprowski Acked-by: Gerd Hoffmann --- drivers/dma-buf/heaps/heap-helpers.c | 13 ++++++------- drivers/dma-buf/udmabuf.c | 7 +++---- 2 files changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/dma-buf/heaps/heap-helpers.c b/drivers/dma-buf/heaps/heap-helpers.c index 9f964ca3f59c..d0696cf937af 100644 --- a/drivers/dma-buf/heaps/heap-helpers.c +++ b/drivers/dma-buf/heaps/heap-helpers.c @@ -140,13 +140,12 @@ struct sg_table *dma_heap_map_dma_buf(struct dma_buf_attachment *attachment, enum dma_data_direction direction) { struct dma_heaps_attachment *a = attachment->priv; - struct sg_table *table; - - table = &a->table; + struct sg_table *table = &a->table; + int ret; - if (!dma_map_sg(attachment->dev, table->sgl, table->nents, - direction)) - table = ERR_PTR(-ENOMEM); + ret = dma_map_sgtable(attachment->dev, table, direction, 0); + if (ret) + table = ERR_PTR(ret); return table; } @@ -154,7 +153,7 @@ static void dma_heap_unmap_dma_buf(struct dma_buf_attachment *attachment, struct sg_table *table, enum dma_data_direction direction) { - dma_unmap_sg(attachment->dev, table->sgl, table->nents, direction); + dma_unmap_sgtable(attachment->dev, table, direction, 0); } static vm_fault_t dma_heap_vm_fault(struct vm_fault *vmf) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index acb26c627d27..89e293bd9252 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -63,10 +63,9 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf, GFP_KERNEL); if (ret < 0) goto err; - if (!dma_map_sg(dev, sg->sgl, sg->nents, direction)) { - ret = -EINVAL; + ret = dma_map_sgtable(dev, sg, direction, 0); + if (ret < 0) goto err; - } return sg; err: @@ -78,7 +77,7 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf, static void put_sg_table(struct device *dev, struct sg_table *sg, enum dma_data_direction direction) { - dma_unmap_sg(dev, sg->sgl, sg->nents, direction); + dma_unmap_sgtable(dev, sg, direction, 0); sg_free_table(sg); kfree(sg); } From patchwork Wed Aug 26 06:33:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 256003 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=-13.8 required=3.0 tests=BAYES_00,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, 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 733DBC433DF for ; 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Wed, 26 Aug 2020 06:35:44 +0000 (GMT) X-AuditID: cbfec7f4-677ff7000000176d-e8-5f4602c0fa83 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id 5F.D0.06314.0C2064F5; Wed, 26 Aug 2020 07:35:44 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20200826063543eusmtip2c16dfa5c1225eec61b01617e9c56a325~uve0EBA_s0302303023eusmtip21; Wed, 26 Aug 2020 06:35:43 +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 , Dmitry Osipenko , Mauro Carvalho Chehab , Greg Kroah-Hartman , Thierry Reding , Jonathan Hunter , linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, devel@driverdev.osuosl.org Subject: [PATCH v9 27/32] staging: tegra-vde: fix common struct sg_table related issues Date: Wed, 26 Aug 2020 08:33:11 +0200 Message-Id: <20200826063316.23486-28-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200826063316.23486-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSa0iTURjmfHel1dcWebrQYN0wSjP7ccKSkorzJxD6lWW29ENFXbapXRBa mVm6WVZgzRzDectL2tJZKzOvs1wmaWVo5bCkktnFJSqmuT6zf8/zvJfneQ+HI6VD9HIuVpUk qFXKeAXjTVnbJl5sekLsjdjcot+I9J1PCXT3RhWNZqw5JHrkmGRR+Y9BgHp+fWNQmrmKQbfL WwlkaghC5w0FFHL3OAlkGXxNo27bLQbpqmtpdMltYFBlyzsWFVumCNT4/SONJmxGaqcMVxgr AH7/uJnC9WMmCj8wvGOxpewSg+vGBmjckF/B4g9ZdgLfKzyD+6YHSXyttwTgh2+1DNanjTA4 u6YM4FHLqtBFYd7bo4T42BRB7R98xDumK7uKTBxadFJbdFALjJJM4MVBfissHs+hMoE3J+VL AWx+amZF4p4ljxxzlVEAp8+9miXc35EB6xFRLwGwLfsnMT/hcpaSnr0MHwAzXZmMBy/h0wFs 1y/wYJJ3UNAxHuhZJOMPwLMT4R6Z4tfCi521tAdL+GA4fdNCivHksLz6yV/sNavbsy4zHi/I 6znYPNVFi0274WTRCCNiGfxqr2FFvBJ2XNNR4kAagM7OSlYkOgC7z90AYlcQ7O+cZDyJSN4X Vtn8RXkXLOwrmLt4Iex1LRbzL4RXrbmkKEvgxQtSsXsdNNjvzNs2dr2cy4/h+/xaIL5PDoC2 3GHiCpAb/puZACgDPkKyJiFa0GxRCSf8NMoETbIq2i/yWIIFzP6+jmm7+z6wTR1tAjwHFAsk JmZPhJRWpmhOJTQByJGKJZKQ5x2HpZIo5anTgvpYhDo5XtA0gRUcpfCRBBZ8CZfy0cokIU4Q EgX1vyrBeS3Xgpj15qDKEK8htrqi5ZBbBccjV1ywksvSV6tVkwFsRn3c79gB48PQQfMXmXx4 jSSpMs2ZXujase3wTOzdLJ+S/ce7Rz93nwzz3SM31amCnYWlOrev/4jfj/ZU/eU1dFGc601q atT1PH5vZL9t3/qQMCt0hS+dwRnPrrYGyfM+5SooTYwyYAOp1ij/AKFVXqR5AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJIsWRmVeSWpSXmKPExsVy+t/xe7oHmNziDS6s4rboPXeSyWLjjPWs Fv+3TWS22HPmF7vF6o+PGS2ufH3PZtG8eD2bxcrVR5ksFuy3tmiZtYjF4suVh0wWmx5fY7W4 vGsOm0XPhq2sFp1fZrFZrD1yl91i2aY/TBYHPzxhtfi5ax6Lg7DHmnlrGD3u7TvM4rH32wIW j52z7rJ7bFrVyeax/dsDVo/9c9ewe9zvPs7ksXlJvcftf4+ZPSbfWM7osftmA5tHb/M7No++ LasYPT5vkgvgj9KzKcovLUlVyMgvLrFVija0MNIztLTQMzKx1DM0No+1MjJV0rezSUnNySxL LdK3S9DLuNC3nrngGX9Fw9LoBsZ5vF2MHBwSAiYSD7YldDFycQgJLGWU2DrhMGsXIydQXEbi 5LQGKFtY4s+1LjaIok+MEm//bWEDSbAJGEp0vYVIiAh0MkpM6/7IDuIwC9xgkZi75QM7SJWw QLjEt0tfwEaxCKhKdJzbCmbzCthJ/Ju5iRlihbzE6g0HwGxOoPjx7n6wDUICthKn185gnsDI t4CRYRWjSGppcW56brGhXnFibnFpXrpecn7uJkZgNG479nPzDsZLG4MPMQpwMCrx8C5gc40X Yk0sK67MPcQowcGsJMLrdPZ0nBBvSmJlVWpRfnxRaU5q8SFGU6CjJjJLiSbnAxNFXkm8oamh uYWlobmxubGZhZI4b4fAwRghgfTEktTs1NSC1CKYPiYOTqkGRvVlRlMqbdNDqxZGpRxo3tRV qTy9uuxX4RpuH2suy9XlvXfv1tkFbCtqvary57L5j3jzPfzmTQEbc/fb8l/7dnPRrRjtsvs9 zq1dHEE34pQZfv5q1DlWcKxhy/6ICqOyFPMY26txJs+vak7iqRCLPfRsH6vmxN367+6aqV39 JjSVY7ZAq+sEJZbijERDLeai4kQAKYI8btwCAAA= X-CMS-MailID: 20200826063544eucas1p230abe33c28618e82608c5b40eb50fa87 X-Msg-Generator: CA X-RootMTR: 20200826063544eucas1p230abe33c28618e82608c5b40eb50fa87 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200826063544eucas1p230abe33c28618e82608c5b40eb50fa87 References: <20200826063316.23486-1-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 the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. Signed-off-by: Marek Szyprowski Reviewed-by: Dmitry Osipenko --- 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 6af863d92123..adf8dc7ee25c 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; From patchwork Wed Aug 26 06:33:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Szyprowski X-Patchwork-Id: 256005 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=-13.8 required=3.0 tests=BAYES_00,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, 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 5F65FC433E1 for ; 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Wed, 26 Aug 2020 06:36:29 +0000 (GMT) X-AuditID: cbfec7f4-65dff7000000176d-61-5f4602ed2f4f Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id D4.F0.06314.DE2064F5; Wed, 26 Aug 2020 07:36:29 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20200826063545eusmtip2c8c042b88f2793200ec3eeb737bb4947~uve2bH14Z0302303023eusmtip23; Wed, 26 Aug 2020 06:35:45 +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 v9 31/32] media: pci: fix common ALSA DMA-mapping related codes Date: Wed, 26 Aug 2020 08:33:15 +0200 Message-Id: <20200826063316.23486-32-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200826063316.23486-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSfSxVYRzuPeeec4+Py3EpbxjrtrTaIqntLGVp1PmnLVurVaRbzpDr6x5X UZs70rg+umpFZtxhlO8urnw0H4ubyc0waVh0rYaMRlTsynHQf8/v+Xif3357CVTciDkQYZGx jDxSKpPg5gJd9x/DkTnkXNDRZ8kHqUxDD0K9zq3BqHVdNkoN/ZrHqVcVXQilafOiloYmEUpr HMaoweZ8nMqobcCoqnfjQqpUu4ZQHQtT2BkRXVlQCei3yxoBrS1Pw+nG5QmM/pKuR+i6kkR6 1GRE6acjZYBu+azE6az6ckAvap0vWlwzPxXMyMLiGLm7903z0G85TVj0jz33GmZNqBJM26qA GQHJ41CpH8JVwJwQky8BXF6tEvDDEoClq/lbyiKA+t8v8O3IQOs6wgtlAFa31YGdSGqGDuFc OOkBVXOqzYQdmQLg+0xLzoSSRgRqaoY3BVvSH84PfAQcFpAHoCGlXqgCBCEiveHDoli+zQVW 1LajHDbboPXpjzdXgmS3EK5MtWO8yRcWlCRtrWcLZ/TcOxx2gutNhQgfSAZw0lAl5IcMAAeT cgHv8oJjhr8414ySh2BNsztP+8D2pUKUoyFpBUfmbDga3YBPdDlbtAimPhLzbleYp6/eqe3o H0B5TMO+ohaUP1A2gI2j34Vq4JL3v0wDQDmwZxRsRAjDHotk7rqx0ghWERnidjsqQgs2vlOv Sb/0BjSv3eoEJAEkliIN7hckxqRxbHxEJ4AEKrETne3rvSEWBUvjExh5VJBcIWPYTuBICCT2 Is+i6UAxGSKNZcIZJpqRb6sIYeagBBXrar8sSzb8euK8Z1V2jIVHoOz0/qxLivgLeZQ6wzr3 qk/2A7fWtMQTX2cTY8YznXblBhiTouj7GhA6O9ai6+gvWThZbCNbvjwx47zS3VE5u7vTb6+s zGra9Xm9MHCk2PHnJ2W6T5R/m0k95dsVcN434YO/bljVbbLucU67su+ORMCGSj0Oo3JW+g8n lyXDSgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOIsWRmVeSWpSXmKPExsVy+t/xe7pvmdziDbZt5LToPXeSyWLjjPWs Fv+3TWS2uPL1PZvFytVHmSwW7Le2+HLlIZPFpsfXWC0u75rDZtGzYSurxdojd9ktlm36w2Rx 8MMTVgdejzXz1jB67P22gMVj06pONo/t3x6wetzvPs7ksXlJvcftf4+ZPSbfWM7osftmA5tH 35ZVjB6fN8kFcEfp2RTll5akKmTkF5fYKkUbWhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSW pRbp2yXoZTybvpO14I1YxdbX/5gbGF8KdzFyckgImEhc2vOfqYuRi0NIYCmjxI1TF5ghEjIS J6c1sELYwhJ/rnWxgdhCAp8YJdZ+8QGx2QQMJbregsS5OEQEOhklpnV/ZAdxmAVeM0m07loD 1iEs4C+xeu5dJhCbRUBV4lzrFqAiDg5eATuJlkUlEAvkJVZvOAC2mBMofLy7H2qZrcTptTOY JzDyLWBkWMUoklpanJueW2yoV5yYW1yal66XnJ+7iREYKduO/dy8g/HSxuBDjAIcjEo8vAvY XOOFWBPLiitzDzFKcDArifA6nT0dJ8SbklhZlVqUH19UmpNafIjRFOimicxSosn5wCjOK4k3 NDU0t7A0NDc2NzazUBLn7RA4GCMkkJ5YkpqdmlqQWgTTx8TBKdXAyCuRkxr7+nLGsulVa0Wd eV8GF1oqWc297hDKNGfCf8M456OBWSqNB6KWyehcli/IYzkpUPq3XeDaxN+sD1TSuotrr8bM 4fjM9e7yisCmkKXZHFfLD+6bHHd7ezGv4my7WU9+9il1Oa1sjL/9cppaLlenuvfe0CmbRbh7 7DKUNX/YLr/+fW+lEktxRqKhFnNRcSIAu19n2aoCAAA= X-CMS-MailID: 20200826063629eucas1p1a3c9c93e281b4c432a6d9940e734e3c4 X-Msg-Generator: CA X-RootMTR: 20200826063629eucas1p1a3c9c93e281b4c432a6d9940e734e3c4 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200826063629eucas1p1a3c9c93e281b4c432a6d9940e734e3c4 References: <20200826063316.23486-1-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 --- 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 df44ed7393a0..3f366e4e4685 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 301616426d8a..c40304d33776 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 7d7aceecc985..3c6fe6ceb0b7 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 544ca57eee75..398c47ff473d 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; }