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hv_netvsc: Fix the queue_mapping in netvsc_vf_xmit() 

netvsc_vf_xmit() / dev_queue_xmit() will call VF NIC’s ndo_select_queue
or netdev_pick_tx() again. They will use skb_get_rx_queue() to get the
queue number, so the “skb->queue_mapping - 1” will be used. This may
cause the last queue of VF not been used.

Use skb_record_rx_queue() here, so that the skb_get_rx_queue() called
later will get the correct queue number, and VF will be able to use
all queues.

Fixes: b3bf5666a5 ("hv_netvsc: defer queue selection to VF")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
zero-sugar-mainline-defconfig
Haiyang Zhang 2020-08-20 14:53:15 -07:00 committed by David S. Miller
parent 4d820543c5
commit c3d897e01a
1 changed files with 1 additions and 1 deletions
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2
drivers/net/hyperv/netvsc_drv.c
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@ -502,7 +502,7 @@ static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev,
int rc;
skb->dev = vf_netdev;
skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
skb_record_rx_queue(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
rc = dev_queue_xmit(skb);
if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) {