Commit 149d36f7 authored Nov 01, 2012 by Michael S. Tsirkin Committed by David S. Miller Nov 02, 2012

tun: report orphan frags errors to zero copy callback



When tun transmits a zero copy skb, it orphans the frags
which might need to allocate extra memory, in atomic context.
If that fails, notify ubufs callback before freeing the skb
as a hint that device should disable zerocopy mode.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 25121173

drivers/net/tun.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -728,6 +728,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff skb, struct net_device dev)

		drop:
		dev->stats.tx_dropped++;
		skb_tx_error(skb);
		kfree_skb(skb);
		rcu_read_unlock();
		return NETDEV_TX_OK;