Commit aa3933b8 authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller

sh_eth: Check for DMA mapping errors on transmit

dma_map_single() may fail if an IOMMU or swiotlb is in use, so
we need to check for this.
Signed-off-by: default avatarBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 740c7f31
......@@ -2174,6 +2174,10 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
skb->len + 2);
txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(&ndev->dev, txdesc->addr)) {
kfree_skb(skb);
return NETDEV_TX_OK;
}
txdesc->buffer_length = skb->len;
if (entry >= mdp->num_tx_ring - 1)
......
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