Messages in this thread Patch in this message | | | Date | Wed, 31 Oct 2012 12:31:15 +0200 | From | "Michael S. Tsirkin" <> | Subject | [PATCHv2 net-next 3/8] tun: report orphan frags errors to zero copy callback |
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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> --- drivers/net/tun.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 3157519..613f826 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -433,6 +433,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev) drop: dev->stats.tx_dropped++; + skb_tx_error(skb, -ENOMEM); kfree_skb(skb); return NETDEV_TX_OK; } -- MST
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