netdev - Re: [PATCH] forcedeth: fix dma api mismatches

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Message-Id: <20090618.004642.31377117.davem@davemloft.net>
Date:	Thu, 18 Jun 2009 00:46:42 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	aabdulla@...dia.com, netdev@...r.kernel.org
Subject: Re: [PATCH] forcedeth: fix dma api mismatches

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 18 Jun 2009 09:17:59 +0200

> Please find following patch, candidate for stable, but alas not tested
> since I dont have the hardware. I hit this on a 2.6.30 kernel on a machine
> I dont have access anymore.
> 
> Thank you
> 
> [PATCH] forcedeth: fix dma api mismatches
> 
> forcedeth doesnt use properly dma api in its tx completion path
> and in nv_loopback_test()
> 
> pci_map_single() should be paired with pci_unmap_single()
> pci_map_page() should be paired with pci_unmap_page()
> 
> forcedeth xmit path uses pci_map_single() & pci_map_page(),
> but tx completion path only uses pci_unmap_single()
> 
> nv_loopback_test() uses pci_map_single() & pci_unmap_page()
> 
> Add a dma_single field in struct nv_skb_map, and
> define a helper function nv_unmap_txskb
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> CC: Ayaz Abdulla <aabdulla@...dia.com>

I'm going to apply this to net-next-2.6 now since it looks
painfully correct to me.
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