Patch "net: hns: Fix the device being used for dma mapping during TX" has been added to the 4.9-stable tree

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 4.9-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-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Kejian Yan <[email protected]>
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 <[email protected]>

[ 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.

---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -304,8 +304,8 @@ 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 [email protected] are

queue-4.9/net-hns-fix-the-device-being-used-for-dma-mapping-during-tx.patch