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| author |   Christoph Hellwig <hch@lst.de> | 2020-09-01 13:48:33 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-25 06:20:48 +0200 |
| commit | c51a9868d361a508c5340788950ece7959009c51 (patch) | |
| tree | 0a065c04f872604fdfe5d6b1483cfcefeb125037 /drivers/firewire | |
| parent | dma-iommu: implement ->alloc_noncoherent (diff) | |
| download | linux-dev-c51a9868d361a508c5340788950ece7959009c51.tar.xz linux-dev-c51a9868d361a508c5340788950ece7959009c51.zip | |
firewire-ohci: use dma_alloc_pages
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 <hch@lst.de>
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/ohci.c | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 020cb15a4d8f..9811c40956e5 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 @@ error: 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++) |