net: call dev_queue_xmit_nit() after skb_dst_drop()

Avoid some atomic ops on dst refcount, calling dev_queue_xmit_nit()
after skb_dst_drop() in dev_hard_start_xmit().

When queueing a packet into af_packet socket, we drop dst anyway.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 822b15b8d11c..d28b3a023bb2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2022,9 +2022,6 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
         int rc = NETDEV_TX_OK;
 
         if (likely(!skb->next)) {
-                if (!list_empty(&ptype_all))
-                        dev_queue_xmit_nit(skb, dev);
-
                 /*
                  * If device doesnt need skb->dst, release it right now while
                  * its hot in this cpu cache
@@ -2032,6 +2029,9 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
                 if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
                         skb_dst_drop(skb);
 
+                if (!list_empty(&ptype_all))
+                        dev_queue_xmit_nit(skb, dev);
+
                 skb_orphan_try(skb);
 
                 if (vlan_tx_tag_present(skb) &&