From 380d687833aee098c4a2c3b35beaefe1c1f48d01 Mon Sep 17 00:00:00 2001 From: Becky Bruce Date: Wed, 8 Apr 2009 09:09:20 -0500 Subject: swiotlb: use swiotlb_sync_single instead of duplicating code Right now both swiotlb_sync_single_range and swiotlb_sync_sg were duplicating the code in swiotlb_sync_single. Just call it instead. Also rearrange the sync_single code for readability. Note that the swiotlb_sync_sg code was previously doing a complicated comparison to determine if an addresses needed to be unmapped where a simple is_swiotlb_buffer() call would have sufficed. Signed-off-by: Becky Bruce Acked-by: FUJITA Tomonori Signed-off-by: Kumar Gala Cc: jeremy@goop.org Cc: ian.campbell@citrix.com LKML-Reference: <1239199761-22886-7-git-send-email-galak@kernel.crashing.org> Signed-off-by: Ingo Molnar --- lib/swiotlb.c | 30 ++++++++++++------------------ 1 file changed, 12 insertions(+), 18 deletions(-) (limited to 'lib/swiotlb.c') diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 2bde54a40d86..d912f068145c 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -731,10 +731,16 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, char *dma_addr = swiotlb_bus_to_virt(dev_addr); BUG_ON(dir == DMA_NONE); - if (is_swiotlb_buffer(dma_addr)) + + if (is_swiotlb_buffer(dma_addr)) { sync_single(hwdev, dma_addr, size, dir, target); - else if (dir == DMA_FROM_DEVICE) - dma_mark_clean(dma_addr, size); + return; + } + + if (dir != DMA_FROM_DEVICE) + return; + + dma_mark_clean(dma_addr, size); } void @@ -761,13 +767,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr, unsigned long offset, size_t size, int dir, int target) { - char *dma_addr = swiotlb_bus_to_virt(dev_addr) + offset; - - BUG_ON(dir == DMA_NONE); - if (is_swiotlb_buffer(dma_addr)) - sync_single(hwdev, dma_addr, size, dir, target); - else if (dir == DMA_FROM_DEVICE) - dma_mark_clean(dma_addr, size); + swiotlb_sync_single(hwdev, dev_addr + offset, size, dir, target); } void @@ -890,15 +890,9 @@ swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl, struct scatterlist *sg; int i; - BUG_ON(dir == DMA_NONE); - - for_each_sg(sgl, sg, nelems, i) { - if (sg->dma_address != swiotlb_phys_to_bus(hwdev, sg_phys(sg))) - sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address), + for_each_sg(sgl, sg, nelems, i) + swiotlb_sync_single(hwdev, sg->dma_address, sg->dma_length, dir, target); - else if (dir == DMA_FROM_DEVICE) - dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length); - } } void -- cgit v1.2.3-58-ga151