netdev - Re: Bug: mv643xxx fails with highmem

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Message-Id: <20141211.151055.817876561546126576.davem@davemloft.net>
Date:	Thu, 11 Dec 2014 15:10:55 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	linux@....linux.org.uk
Cc:	ezequiel.garcia@...e-electrons.com, netdev@...r.kernel.org
Subject: Re: Bug: mv643xxx fails with highmem

From: Russell King - ARM Linux <linux@....linux.org.uk>
Date: Thu, 11 Dec 2014 19:49:20 +0000

> Commit 69ad0dd7af22 removed skb_frag_dma_map() in favour of mapping
> all fragments with dma_map_single().  This fails when the driver is
> used in an environment with highmem.

This change looks really buggy to me.

Unfortunately, all the changes he subsequently makes for software TSO
support depend upon this :-/

The change is definitely wrong.
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