netdev - Re: [PATCH net] netconsole: Check for carrier before calling netpoll_send

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Date:	Mon, 10 Aug 2015 21:22:56 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jmaxwell37@...il.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	jmaxwell@...hat.com
Subject: Re: [PATCH net] netconsole: Check for carrier before calling
 netpoll_send_udp()

From: Jon Maxwell <jmaxwell37@...il.com>
Date: Tue, 11 Aug 2015 11:32:26 +1000

> We have seen a few crashes recently where a NIC is getting
> reset for some reason and then the driver or another module calls
> printk() which invokes netconsole. Netconsole then calls the
> adapter specific poll routine via netpoll which crashes because 
> the adapter is resetting and its structures are being reinitialized.

This isn't a fix.

What if the carrier check passes, and then the chip reset starts on
another cpu?  You'll have the same problem.

I'm not applying this, sorry.
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