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6lowpan: handle dev_queue_xmit() error code properly

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dev_queue_xmit() will return a positive value if the packet could not be
queued, often because the real network device (in our case the mac802154
wpan device) has its queue stopped.  lowpan_xmit() should handle the
positive return code (for the debug statement) and return that value to
the higher layer so the higher layer will retry sending the packet.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alan Ott 2013-04-03 04:00:58 +00:00 committed by David S. Miller
parent e937f583ec
commit fc52eea4c5
1 changed files with 2 additions and 2 deletions
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net/ieee802154/6lowpan.c
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@ -1139,10 +1139,10 @@ static netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
error: error:
dev_kfree_skb(skb); dev_kfree_skb(skb);
out: out:
if (err < 0) if (err)
pr_debug("ERROR: xmit failed\n"); pr_debug("ERROR: xmit failed\n");
return (err < 0 ? NETDEV_TX_BUSY : NETDEV_TX_OK); return (err < 0) ? NET_XMIT_DROP : err;
} }
static struct wpan_phy *lowpan_get_phy(const struct net_device *dev) static struct wpan_phy *lowpan_get_phy(const struct net_device *dev)