Subject: Re: Bug: mv643xxx fails with highmem

From: Ezequiel Garcia <[email-masked]>
Date: Thu, 11 Dec 2014 17:12:03 -0300

On 12/11/2014 05:10 PM, David Miller wrote:
> From: Russell King - ARM Linux <[email-masked]>
> 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.
> 

Got it. I'll take a closer look and will try to think a fix for this.

-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com