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Message-ID: <4de821ec82393438f8124bebcdbc5158d037dd6b.1375733180.git.cmetcalf@tilera.com> Date: Mon, 5 Aug 2013 16:06:20 -0400 From: Chris Metcalf <cmetcalf@...era.com> To: <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org> Subject: [PATCH 17/20] tile PCI DMA: fix bug in non-page-aligned accessors The code incorrectly masked with PAGE_OFFSET instead of PAGE_SIZE-1. This only matters when trying to do a non page-aligned DMA; it was noticed during code inspection. Signed-off-by: Chris Metcalf <cmetcalf@...era.com> --- arch/tile/kernel/pci-dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c index 3570ff7..cbc6fc4 100644 --- a/arch/tile/kernel/pci-dma.c +++ b/arch/tile/kernel/pci-dma.c @@ -257,7 +257,7 @@ static void tile_dma_unmap_page(struct device *dev, dma_addr_t dma_address, BUG_ON(!valid_dma_direction(direction)); __dma_complete_page(pfn_to_page(PFN_DOWN(dma_address)), - dma_address & PAGE_OFFSET, size, direction); + dma_address & (PAGE_SIZE - 1), size, direction); } static void tile_dma_sync_single_for_cpu(struct device *dev, @@ -436,7 +436,7 @@ static void tile_pci_dma_unmap_page(struct device *dev, dma_addr_t dma_address, dma_address -= get_dma_offset(dev); __dma_complete_page(pfn_to_page(PFN_DOWN(dma_address)), - dma_address & PAGE_OFFSET, size, direction); + dma_address & (PAGE_SIZE - 1), size, direction); } static void tile_pci_dma_sync_single_for_cpu(struct device *dev, -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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