> -----Original Message-----
> From: netdev-ow...@vger.kernel.org [mailto:netdev-ow...@vger.kernel.org]
> On Behalf Of Salil Mehta
> Sent: Thursday, February 09, 2017 5:24 PM
> To: da...@davemloft.net
> Cc: salil.me...@huawei.com; yisen.zhu...@huawei.com;
> mehta.salil....@gmail.com; net...@vger.kernel.org;
> linux-kernel@vger.kernel.org; linux...@huawei.com; Kejian Yan
> Subject: [PATCH net] net: hns: Fix the device being used for dma mapping
> during
> TX
>
> From: Kejian Yan <yankej...@huawei.com>
>
> This patch fixes the device being used to DMA map skb->data.
> Erroneous device assignment causes the crash when SMMU is enabled.
> This happens during TX since buffer gets DMA mapped with device
> correspondign to net_device and gets unmapped using the device
> related to DSAF.
>
> Signed-off-by: Kejian Yan <yankej...@huawei.com>
> Reviewed-by: Yisen Zhuang <yisen.zhu...@huawei.com>
> Signed-off-by: Salil Mehta <salil.me...@huawei.com>
> ---
> drivers/net/ethernet/hisilicon/hns/hns_enet.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> index 672b646..2b52a12 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
> @@ -305,7 +305,7 @@ int hns_nic_net_xmit_hw(struct net_device *ndev,
> struct hns_nic_ring_data *ring_data)
> {
> struct hns_nic_priv *priv = netdev_priv(ndev);
> - struct device *dev = priv->dev;
> + struct device *dev = ring_to_dev(ring_data->ring);
> struct hnae_ring *ring = ring_data->ring;
struct device *dev = ring_to_dev(ring); ??????
> struct netdev_queue *dev_queue;
> struct skb_frag_struct *frag;
> --
> 1.7.9.5
>
