From: Alexey Khoroshilov <khoroshi...@ispras.ru>
Date: Sat, 15 Apr 2017 01:50:50 +0300
> @@ -1136,6 +1141,10 @@ static netdev_tx_t ns83820_hard_start_xmit(struct
> sk_buff *skb,
> if (nr_frags)
> len -= skb->data_len;
> buf = pci_map_single(dev->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
> + if (pci_dma_mapping_error(dev->pci_dev, buf)) {
> + dev_kfree_skb_any(skb);
> + return NETDEV_TX_OK;
> + }
>
> first_desc = dev->tx_descs + (free_idx * DESC_SIZE);
>
You need to also add this check for the skb_map_dma_frag() calls below
this line, and therefore you'll need to add unwind on such a failure.
