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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 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> 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: Bartlomiej Zolnierkiewicz , David Airlie , linux-media@vger.kernel.org, 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 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(-) -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel 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; }