netdev - Re: [PATCH 2/6] ibmveth: Implement ethtool hooks to enable/disable checksum offload

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Message-ID: <46B8E891.80403@garzik.org>
Date:	Tue, 07 Aug 2007 17:48:01 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Brian King <brking@...ux.vnet.ibm.com>
CC:	santil@...ux.vnet.ibm.com, rcjenn@...ux.vnet.ibm.com,
	netdev@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH 2/6] ibmveth: Implement ethtool hooks to enable/disable
 checksum offload

Brian King wrote:
> This patch adds the appropriate ethtool hooks to allow for enabling/disabling
> of hypervisor assisted checksum offload for TCP.
> 
> Signed-off-by: Brian King <brking@...ux.vnet.ibm.com>
> ---
> 
>  linux-2.6-bjking1/drivers/net/ibmveth.c |  118 +++++++++++++++++++++++++++++++-
>  linux-2.6-bjking1/drivers/net/ibmveth.h |    1 
>  2 files changed, 117 insertions(+), 2 deletions(-)
> 
> diff -puN drivers/net/ibmveth.c~ibmveth_csum_offload_ethtool drivers/net/ibmveth.c
> --- linux-2.6/drivers/net/ibmveth.c~ibmveth_csum_offload_ethtool	2007-08-01 14:55:14.000000000 -0500
> +++ linux-2.6-bjking1/drivers/net/ibmveth.c	2007-08-01 14:55:14.000000000 -0500
> @@ -641,12 +641,125 @@ static u32 netdev_get_link(struct net_de
>  	return 1;
>  }
>  
> +static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
> +{
> +	struct ibmveth_adapter *adapter = dev->priv;
> +
> +	if (data)
> +		adapter->rx_csum = 1;
> +	else {
> +		adapter->rx_csum = 0;
> +		dev->features &= ~NETIF_F_IP_CSUM;

why does this RX-related code clear a TX-related flag?

otherwise looks OK


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