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Date: Wed, 19 Aug 2009 18:43:27 +0800 From: DDD <Dongdong.deng@...driver.com> To: Matt Mackall <mpm@...enic.com> Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu> Subject: [PATCH] netpoll: WARN_ONCE for start_xmit returns with interrupts enabled The NETPOLL API requires that interrupts remain disabled in netpoll_send_skb(). Add a WARN_ONCE when ndo_start_xmit returns with interrupts enabled in netpoll_send_skb(). Signed-off-by: Dongdong Deng <dongdong.deng@...driver.com> --- net/core/netpoll.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/net/core/netpoll.c b/net/core/netpoll.c index df30feb..d38103f 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -319,6 +319,12 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb) udelay(USEC_PER_POLL); } + + WARN_ONCE(!irqs_disabled(), + KERN_WARNING "netpoll_send_skb(): [net driver %s]" + "ndo_start_xmit() shouldn't return with interrupts" + "enabled!", dev->name); + local_irq_restore(flags); } -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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