33 lines
1.2 KiB
Diff
33 lines
1.2 KiB
Diff
commit 2087ac1fc6fd9bbb1f7e16889e984e0af0510b4b
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Author: Neil Horman <nhorman@tuxdriver.com>
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Date: Thu Jun 13 15:25:45 2013 -0400
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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
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check dma mapping results with dma_mapping_error() durring tx ring refills.
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Easy fix, just add it in, and drop the frame if the mapping is bad
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Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
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CC: Grant Grundler <grundler@parisc-linux.org>
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CC: "David S. Miller" <davem@davemloft.net>
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diff --git a/drivers/net/ethernet/dec/tulip/interrupt.c b/drivers/net/ethernet/dec/tulip/interrupt.c
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index 28a5e42..92306b3 100644
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--- a/drivers/net/ethernet/dec/tulip/interrupt.c
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+++ b/drivers/net/ethernet/dec/tulip/interrupt.c
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@@ -76,6 +76,12 @@ int tulip_refill_rx(struct net_device *dev)
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mapping = pci_map_single(tp->pdev, skb->data, PKT_BUF_SZ,
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PCI_DMA_FROMDEVICE);
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+ if (dma_mapping_error(&tp->pdev->dev, mapping)) {
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+ dev_kfree_skb(skb);
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+ tp->rx_buffers[entry].skb = NULL;
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+ break;
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+ }
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+
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tp->rx_buffers[entry].mapping = mapping;
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tp->rx_ring[entry].buffer1 = cpu_to_le32(mapping);
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