netdev - Re: [PATCH net-2.6] jme: Fix unmap error (Causing system freeze)

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Message-Id: <20110721.152331.2027457406280709611.davem@davemloft.net>
Date:	Thu, 21 Jul 2011 15:23:31 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	chrisw@...s-sol.org
Cc:	cooldavid@...ldavid.org, netdev@...r.kernel.org,
	arieslee@...cron.com, devinchiu@...cron.com, jason@...bhome.org,
	marcus.disi@...il.com, mschiff@...too.org, jason@...gsoftware.com,
	stable@...nel.org
Subject: Re: [PATCH net-2.6] jme: Fix unmap error (Causing system freeze)

From: Chris Wright <chrisw@...s-sol.org>
Date: Thu, 21 Jul 2011 12:30:08 -0700

> * cooldavid@...ldavid.org (cooldavid@...ldavid.org) wrote:
>> From: Guo-Fu Tseng <cooldavid@...ldavid.org>
>> 
>> This patch add the missing dma_unmap().
>> Which solved the critical issue of system freeze on heavy load.
>> 
>> Michal Miroslaw's rejected patch:
>> [PATCH v2 10/46] net: jme: convert to generic DMA API
>> Pointed out the issue also, thank you Michal.
>> But the fix was incorrect. It would unmap needed address
>> when low memory.
>> 
>> Got lots of feedback from End user and Gentoo Bugzilla.
>> https://bugs.gentoo.org/show_bug.cgi?id=373109
>> Thank you all. :)
> 
> Also referred to in kernel bugzilla:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=39312
> 
>> Cc: stable@...nel.org
>> Signed-off-by: Guo-Fu Tseng <cooldavid@...ldavid.org>
> 
> Acked-by: Chris Wright <chrisw@...s-sol.org>

Applied, but it's too late for 3.0 so I'll just submit it to all
the -stable branches after 3.0-final is released.

Thanks.
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