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netpoll: warning for ndo_start_xmit returns with interrupts enabled

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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>
This commit is contained in:
Dongdong Deng 2009-08-21 03:33:36 +00:00 committed by David S. Miller
parent c189308bd8
commit 79b1bee888
1 changed files with 5 additions and 0 deletions
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5
net/core/netpoll.c
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@ -319,6 +319,11 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
udelay(USEC_PER_POLL);
}
WARN_ONCE(!irqs_disabled(),
"netpoll_send_skb(): %s enabled interrupts in poll (%pF)\n",
dev->name, ops->ndo_start_xmit);
local_irq_restore(flags);
}