netpoll: warning for ndo_start_xmit returns with interrupts enabled
WARN_ONCE for ndo_start_xmit() enable interrupts in netpoll_send_skb(), because the NETPOLL API requires that interrupts remain disabled in netpoll_send_skb(). Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -319,6 +319,11 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
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udelay(USEC_PER_POLL);
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udelay(USEC_PER_POLL);
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}
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}
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WARN_ONCE(!irqs_disabled(),
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"netpoll_send_skb(): %s enabled interrupts in poll (%pF)\n",
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dev->name, ops->ndo_start_xmit);
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local_irq_restore(flags);
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local_irq_restore(flags);
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}
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}
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