hv_netvsc: Fix the queue_mapping in netvsc_vf_xmit()

[ Upstream commit c3d897e01aef8ddc43149e4d661b86f823e3aae7 ]

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: b3bf5666a510 ("hv_netvsc: defer queue selection to VF")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 10c3480c2da89d4eb9018aea129da5216613f05e..dbc6c9ed1c8f859c77153f7bb928da1be4e626a7 100644 (file)
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -500,7 +500,7 @@ 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)) {