netdev - Re: [PATCH] ixgbe: fix mismatched dma map/unmap size

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Message-Id: <20090611.032024.218154973.davem@davemloft.net>
Date:	Thu, 11 Jun 2009 03:20:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	chrisw@...s-sol.org
Cc:	jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
	e1000-devel@...ts.sourceforge.net, andy@...yhouse.net
Subject: Re: [PATCH] ixgbe: fix mismatched dma map/unmap size

From: Chris Wright <chrisw@...s-sol.org>
Date: Tue, 9 Jun 2009 10:11:51 -0700

> DMA buffer is mapped w/ NET_IP_ALIGN accounted, unmapped w/out.
> Dma debugging generates this warning.  Simple fix below.
> 
> [   76.356509] ixgbe 0000:04:00.0: DMA-API: device driver frees DMA
> memory with different size [device address=0x00000000fff7f022] [map
> size=1524 bytes] [unmap size=1522 bytes]
> ...
> [   76.440333]  [<ffffffffa000247f>] ixgbe_clean_rx_irq+0x123/0x41b [ixgbe]
> ...
> [   76.551151] Mapped at:
> [   76.553582]  [<ffffffff811bd745>] debug_dma_map_page+0x4d/0xf8
> [   76.559584]  [<ffffffffa00012d4>] ixgbe_alloc_rx_buffers+0x204/0x2af [ixgbe]
> 
> Signed-off-by: Chris Wright <chrisw@...s-sol.org>
> ---
> Fix is against v2.6.30-rc8-73-g3af968e, but still applies to net-next.

I'll leave this for Jeff to suck into his queue.   Thanks Chris.
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