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tulip: Properly check dma mapping result

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Tulip throws an error when dma debugging is enabled, as it doesn't properly
check dma mapping results with dma_mapping_error() durring tx ring refills.

Easy fix, just add it in, and drop the frame if the mapping is bad

Signed-off-by: Neil Horman <[email protected]>
CC: Grant Grundler <[email protected]>
CC: "David S. Miller" <[email protected]>
Reviewed-by: Grant Grundler <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Neil Horman 2013-06-13 15:31:28 -04:00 • committed by David S. Miller
commit c9bfbb31af
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/dec/tulip/interrupt.c
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@ -76,6 +76,12 @@ int tulip_refill_rx(struct net_device *dev)
mapping = pci_map_single(tp->pdev, skb->data, PKT_BUF_SZ,
PCI_DMA_FROMDEVICE);
if (dma_mapping_error(&tp->pdev->dev, mapping)) {
dev_kfree_skb(skb);
tp->rx_buffers[entry].skb = NULL;
break;
}
tp->rx_buffers[entry].mapping = mapping;
tp->rx_ring[entry].buffer1 = cpu_to_le32(mapping);