ia64/sn: remove the mapping_error dma_map_ops method

Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let
the core dma-mapping code handle the rest.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/ia64/sn/pci/pci_dma.c b/arch/ia64/sn/pci/pci_dma.c
index 4ce4ee4..b7d42e4 100644 (file)
--- a/arch/ia64/sn/pci/pci_dma.c
+++ b/arch/ia64/sn/pci/pci_dma.c
@@ -196,7 +196,7 @@ static dma_addr_t sn_dma_map_page(struct device *dev, struct page *page,
 
        if (!dma_addr) {
                printk(KERN_ERR "%s: out of ATEs\n", __func__);
-               return 0;
+               return DMA_MAPPING_ERROR;
        }
        return dma_addr;
 }
@@ -314,11 +314,6 @@ static int sn_dma_map_sg(struct device *dev, struct scatterlist *sgl,
        return nhwentries;
 }
 
-static int sn_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-       return 0;
-}
-
 static u64 sn_dma_get_required_mask(struct device *dev)
 {
        return DMA_BIT_MASK(64);
@@ -441,7 +436,6 @@ static struct dma_map_ops sn_dma_ops = {
        .unmap_page             = sn_dma_unmap_page,
        .map_sg                 = sn_dma_map_sg,
        .unmap_sg               = sn_dma_unmap_sg,
-       .mapping_error          = sn_dma_mapping_error,
        .dma_supported          = sn_dma_supported,
        .get_required_mask      = sn_dma_get_required_mask,
 };