linux-kernel - Re: [PATCH] af_packet: Don't use skb after dev_queue

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Message-ID: <4B5885BA.7090007@s5r6.in-berlin.de>
Date:	Thu, 21 Jan 2010 17:50:02 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	Michael Breuer <mbreuer@...jas.com>,
	Jarek Poplawski <jarkao2@...il.com>,
	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	flyboy@...il.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] af_packet: Don't use skb after dev_queue_xmit()

Stefan Richter wrote:
> I didn't read the start of this thread and may misunderstand the issue,
> but I comment anyway...:
> 
> Documentation/DMA-API.txt says the following about (pci_)dma_sync_single
> and friends:  "All the parameters must be the same as those passed into
> the single mapping API."
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/DMA-API.txt;h=5aceb88b3f8b622c8c23ed288f37f42de705c904;hb=HEAD#l367
> 
> So, it might be considered an API bug --- but it is a documented one. :-)

Disregard my comment.  I just noticed that there is more qualified
discussion of this in the thread "[PATCH] sky2: Fix WARNING: at
lib/dma-debug.c:902 check_sync".
-- 
Stefan Richter
-=====-==-=- ---= =-=-=
http://arcgraph.de/sr/
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