netdev - Re: [PATCH 3/4] e1000e: Calculate the desc

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Date:	Mon, 20 May 2013 02:37:48 -0700
From:	Jeff Kirsher <tarbal@...il.com>
To:	Wei Yang <weiyang@...ux.vnet.ibm.com>
CC:	jeffrey.t.kirsher@...el.com, e1000-devel@...ts.sourceforge.net,
	netdev@...r.kernel.org
Subject: Re: [PATCH 3/4] e1000e: Calculate the desc_len based on adapter type

On 05/20/2013 01:15 AM, Wei Yang wrote:
> desc_len represents the size of descriptor in rx_ring. There are two kinds of
> rx descriptors, e1000_rx_desc_packet_split(32 byte) and
> e1000_rx_desc_extended(16 byte). Different adapter will use different rx
> descriptors.
>
> When allocating the dma space for this descriptor in current implementation,
> the code ignore the descriptor type and take it as e1000_rx_desc_packet_split
> in any case. This behavior will not effect the function, but will require
> double size of dma space.
>
> This patch will calculate the desc_len based on the adapter type.
>
> Tested on T420, which use e1000_rx_desc_extended and works fine.
>
> Signed-off-by: Wei Yang <weiyang@...ux.vnet.ibm.com>
> ---
>  drivers/net/ethernet/intel/e1000e/netdev.c |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
Thanks, I have added the patch to my queue for e1000e.


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