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

drivers/net/ethernet/renesas/sh_eth.c

+4 −0
Original line number Diff line number Diff line
@@ -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)