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From: Olaf Kirch <olaf.kirch@oracle.com>
Organization: Oracle
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch] revert: [NET]: Fix races in net_rx_action vs netpoll
Date: Thu, 19 Jul 2007 21:35:41 +0200
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Cc: "Kok, Auke" <auke-jan.h.kok@intel.com>, Jarek Poplawski <jarkao2@o2.pl>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       linux-kernel@vger.kernel.org, davem@davemloft.net
References: <20070716091236.GA10718@elte.hu> <200707192113.26878.olaf.kirch@oracle.com> <20070719192256.GA22151@elte.hu>
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Does the following help?

Olaf
-- 
Olaf Kirch  |  --- o --- Nous sommes du soleil we love when we play
okir@lst.de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax
Test patch
---
Index: build-2.6/drivers/net/netconsole.c
===================================================================
--- build-2.6.orig/drivers/net/netconsole.c
+++ build-2.6/drivers/net/netconsole.c
@@ -70,7 +70,7 @@ static void write_msg(struct console *co
 	int frag, left;
 	unsigned long flags;
 
-	if (!np.dev)
+	if (!np.dev || !netif_running(np.dev))
 		return;
 
 	local_irq_save(flags);