From: Neil Horman <nhor...@tuxdriver.com> Date: Fri, 29 Dec 2017 11:40:10 -0500
> @@ -2067,6 +2072,9 @@ vortex_start_xmit(struct sk_buff *skb, struct > net_device *dev) > int len = (skb->len + 3) & ~3; > vp->tx_skb_dma = pci_map_single(VORTEX_PCI(vp), skb->data, len, > PCI_DMA_TODEVICE); > + if (dma_mapping_error(&VORTEX_PCI(vp)->dev, vp->tx_skb_dma)) > + return NETDEV_TX_OK; > + This leaks the SKB, right? And for the RX cases, it allows the RX ring to deplete to empty which tends to hang most chips. You need to make the DMA failure detection early and recycle the RX buffer back to the chip instead of passing it up to the stack.
