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 <m...@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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