linux-kernel - Re: [PATCH] e100_shutdown: netif_poll

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Date:	Fri, 20 Oct 2006 14:09:31 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	Auke Kok <auke-jan.h.kok@...el.com>
CC:	Daniel Walker <dwalker@...sta.com>, Andrew Morton <akpm@...l.org>,
	Jeff Garzik <jgarzik@...ox.com>, linux-kernel@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	NetDev <netdev@...r.kernel.org>
Subject: Re: [PATCH] e100_shutdown: netif_poll_disable hang

Auke Kok wrote:
> Daniel Walker wrote:
>> My machine annoyingly hangs while rebooting. I tracked it down
>> to e100-fix-reboot-f-with-netconsole-enabled.patch in 2.6.18-rc2-mm2
>>
>> I review the changes and it seemed to be calling netif_poll_disable
>> one too many time. Once in e100_down(), and again in e100_shutdown().
>>
>> The second one in e100_shutdown() caused the hang. So this patch
>> removes it.

it doesn't even do harm to netif_poll_disable() twice as far as I can see, as it merely 
calls test_and_set_bit(), which will instantly succeed on the first attempt if the bit 
was already set.

did this change actually fix it for you? I'm wondering if the netif_carrier_off might 
not be the culprit here...

Auke
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