Patch "net: hns: Fix the device being used for dma mapping during TX" has been added to the 4.4-stable tree

Patch "net: hns: Fix the device being used for dma mapping during TX" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net: hns: Fix the device being used for dma mapping during TX

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-hns-fix-the-device-being-used-for-dma-mapping-during-tx.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Jun 15 11:13:01 CEST 2017
From: Kejian Yan <yankejian@huawei.com>
Date: Tue, 23 May 2017 21:53:41 -0400
Subject: net: hns: Fix the device being used for dma mapping during TX

From: Kejian Yan <yankejian@huawei.com>


[ Upstream commit b85ea006b6bebb692628f11882af41c3e12e1e09 ]

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 <yankejian@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -105,8 +105,8 @@ int hns_nic_net_xmit_hw(struct net_devic
 			struct hns_nic_ring_data *ring_data)
 {
 	struct hns_nic_priv *priv = netdev_priv(ndev);
-	struct device *dev = priv->dev;
 	struct hnae_ring *ring = ring_data->ring;
+	struct device *dev = ring_to_dev(ring);
 	struct netdev_queue *dev_queue;
 	struct skb_frag_struct *frag;
 	int buf_num;


Patches currently in stable-queue which might be from yankejian@huawei.com are

queue-4.4/net-hns-fix-the-device-being-used-for-dma-mapping-during-tx.patch