提交 178c7ae9 编写于 作者: A Alexey Khoroshilov 提交者: David S. Miller

net: macb: add check for dma mapping error in start_xmit()

at91ether_start_xmit() does not check for dma mapping errors.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 f82ef3e1
......@@ -2673,6 +2673,12 @@ static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
lp->skb_length = skb->len;
lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(NULL, lp->skb_physaddr)) {
dev_kfree_skb_any(skb);
dev->stats.tx_dropped++;
netdev_err(dev, "%s: DMA mapping error\n", __func__);
return NETDEV_TX_OK;
}
/* Set address of the data in the Transmit Address register */
macb_writel(lp, TAR, lp->skb_physaddr);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册