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>
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index df30feb..1b76eb1 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -319,6 +319,11 @@
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);
}
