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Fri, 19 Jun 2020 10:37:16 +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 v7 35/36] media: pci: fix common ALSA DMA-mapping related codes Date: Fri, 19 Jun 2020 12:36:35 +0200 Message-Id: <20200619103636.11974-36-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200619103636.11974-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSe0hTURzHObu78zqdXOfroJIwSixMkx7cMMRC6IJEGdILZs28qTRfu86y kkTLnE7NTHyiyyzzrfOZYjotZ1kjVMxSKdGKOU3xBZrMNu+0/z7f3/f7O9/D4WAIvwV1xMIj YylJpEgs4HDZrf3rmoPC3LmgQ4rf7kSG5j2LaMyvR4mt1myEGFld4BCV1e9YhKLbm1gZmWIR yulRlBjuKOYQ8oYWlKh9O2lGvFRusgjV4gzqyyNrSmoA2bWmYJPKKhmHbFv7gZLf09Ussqn8 Pjmun0bInLEKQHZ+TeSQmc1VgFxW7jlncYV7IoQSh8dREk+fa9ywX3mv0eg5+9stOj2SCLQ2 acAcg/gR+CbvD0gDXIyPvwJQtd7DYsQKgKXLGpNYBrBv4Tm6szLxYtFkVADYVpmK7q5k5hZs pzi4F0ybT+MY2RZ/COBAhqUxhODTLKioHzUYGGaDB8CNImdjho3vg8/kK8DIPNwHDvTLTW0u sLqhBzGyuWGue6AyzfvNoLrhKMN+8G9BoxnDNnBW3WxiZziYI2cbeyGeDOCUptaMEXIAh5Py AZPyhhOaje0LIfh+WN/haUSIn4TJWn8GreDYvLUxjBjwSWsewox5MDWFz5zhCgvVdbutqs9D CMMk7Nb8ND1PNoCjfaXoY+BS+L9LAUAVcKCkdEQoRXtFUrc8aFEELY0M9bgeFaEEhs80qFcv tYPVoeBegGNAYMnzvagL4qOiODo+ohdADBHY8k59Ggzi80JE8XcoSdRViVRM0b3ACWMLHHiH y7RCPh4qiqVuUlQ0JdlxWZi5YyKw8lehZ3kT+cIvl5emUzeyZPSILL3YtjRZ7Fo2WXQjMOmS sGQcSRi3P6+TfkvaCJ/tlKF2W3vd1XeDZZtaSncc5WcHWNT1DpyxMj99IavQK0Dvlu0WkqqI ac/8kNKF2vnik+hHcaaT37z1MSx45l5T4KOnCVnxTUDYF70WUy5g02EirwOIhBb9A3JOGzNI AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprBIsWRmVeSWpSXmKPExsVy+t/xe7qxU9/EGWzvlrLoPXeSyWLjjPWs Fv+3TWS2uPL1PZvFytVHmSwW7Le2+HLlIZPFpsfXWC0u75rDZtGzYSurxdojd9ktlm36w2Rx 8MMTVgdejzXz1jB67P22gMVj06pONo/t3x6wetzvPs7ksXlJvcftf4+ZPSbfWM7osftmA5tH 35ZVjB6fN8kFcEfp2RTll5akKmTkF5fYKkUbWhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSW pRbp2yXoZTybvpO14I1YxdbX/5gbGF8KdzFyckgImEjcWfqBqYuRi0NIYCmjxPeXP9kgEjIS J6c1sELYwhJ/rnWxQRR9YpSYPGE6WBGbgKFE11uIhIhAJ6PEtO6P7CAOs8BrJonWXWuAMhwc wgL+EtOv5II0sAioSizs+cIIYvMK2EmcONYDtUFeYvWGA8wgNidQ/HXLQbC4kICtxPIF75kn MPItYGRYxSiSWlqcm55bbKRXnJhbXJqXrpecn7uJERgr24793LKDsetd8CFGAQ5GJR7eFyGv 44RYE8uKK3MPMUpwMCuJ8DqdPR0nxJuSWFmVWpQfX1Sak1p8iNEU6KiJzFKiyfnAOM4riTc0 NTS3sDQ0NzY3NrNQEuftEDgYIySQnliSmp2aWpBaBNPHxMEp1cBY/GGb0mMhFpbbvpf2BS5f meIilXgp/nLFx/4PjJuETwhHrhaQUV1qOnnVbwX2IAFFUb2i71y/XZ781ey8+KFoj7SB5Wm+ vuUf/KpnxIV7uM47u1113T7/Df4Jh583NgptDP+pajsveYnBn7vPViyVX+hs9TMtaPKKRSnB 3AuXn7CoXzT16vN1SizFGYmGWsxFxYkAE+qwkqsCAAA= X-CMS-MailID: 20200619103717eucas1p23b82366794c92cc70c0492e4ca29c4a1 X-Msg-Generator: CA X-RootMTR: 20200619103717eucas1p23b82366794c92cc70c0492e4ca29c4a1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200619103717eucas1p23b82366794c92cc70c0492e4ca29c4a1 References: <20200619103636.11974-1-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; }