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Bottomley" , Joonyoung Shim , Seung-Woo Kim , Ben Skeggs , Marek Szyprowski , Tomasz Figa , Matt Porter , iommu@lists.linux-foundation.org Subject: [PATCH 17/17] firewire-ohci: use dma_alloc_pages Date: Mon, 14 Sep 2020 16:44:33 +0200 Message-Id: <20200914144433.1622958-18-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200914144433.1622958-1-hch@lst.de> References: <20200914144433.1622958-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Cc: alsa-devel@alsa-project.org, linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-parisc@vger.kernel.org, linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, Stefan Richter , netdev@vger.kernel.org, linux1394-devel@lists.sourceforge.net, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Use dma_alloc_pages to allocate DMAable pages instead of hoping that the architecture either has GFP_DMA32 or not more than 4G of memory. Signed-off-by: Christoph Hellwig --- drivers/firewire/ohci.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 020cb15a4d8fcc..9811c40956e54d 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -674,17 +674,16 @@ static void ar_context_link_page(struct ar_context *ctx, unsigned int index) static void ar_context_release(struct ar_context *ctx) { + struct device *dev = ctx->ohci->card.device; unsigned int i; vunmap(ctx->buffer); - for (i = 0; i < AR_BUFFERS; i++) - if (ctx->pages[i]) { - dma_unmap_page(ctx->ohci->card.device, - ar_buffer_bus(ctx, i), - PAGE_SIZE, DMA_FROM_DEVICE); - __free_page(ctx->pages[i]); - } + for (i = 0; i < AR_BUFFERS; i++) { + if (ctx->pages[i]) + dma_free_pages(dev, PAGE_SIZE, ctx->pages[i], + ar_buffer_bus(ctx, i), DMA_FROM_DEVICE); + } } static void ar_context_abort(struct ar_context *ctx, const char *error_msg) @@ -970,6 +969,7 @@ static void ar_context_tasklet(unsigned long data) static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, unsigned int descriptors_offset, u32 regs) { + struct device *dev = ohci->card.device; unsigned int i; dma_addr_t dma_addr; struct page *pages[AR_BUFFERS + AR_WRAPAROUND_PAGES]; @@ -980,17 +980,13 @@ static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx); for (i = 0; i < AR_BUFFERS; i++) { - ctx->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32); + ctx->pages[i] = dma_alloc_pages(dev, PAGE_SIZE, &dma_addr, + DMA_FROM_DEVICE, GFP_KERNEL); if (!ctx->pages[i]) goto out_of_memory; - dma_addr = dma_map_page(ohci->card.device, ctx->pages[i], - 0, PAGE_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(ohci->card.device, dma_addr)) { - __free_page(ctx->pages[i]); - ctx->pages[i] = NULL; - goto out_of_memory; - } set_page_private(ctx->pages[i], dma_addr); + dma_sync_single_for_device(dev, dma_addr, PAGE_SIZE, + DMA_FROM_DEVICE); } for (i = 0; i < AR_BUFFERS; i++) -- 2.28.0