netdev - Re: [Patch 1/2] s2io: add dynamic LRO disable support

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Date:	Thu, 3 Jun 2010 15:38:11 +0200
From:	Michal Schmidt <mschmidt@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Amerigo Wang <amwang@...hat.com>, herbert.xu@...hat.com,
	nhorman@...hat.com, sgruszka@...hat.com, davem@...emloft.net,
	Ramkrishna Vepa <Ramkrishna.Vepa@...r.com>
Subject: Re: [Patch 1/2] s2io: add dynamic LRO disable support

[adding Ram Vepa to CC]

On Wed, 2 Jun 2010 23:38:59 -0400 Amerigo Wang wrote:
> 
> This patch adds dynamic LRO diable support for s2io net driver.
> 
> I don't have s2io card, so only did compiling test. Anyone who wants
> to test this is more than welcome.
> 
> This is based on Neil's initial work.
> 
> Signed-off-by: WANG Cong <amwang@...hat.com>
> Signed-off-by: Neil Horman <nhorman@...hat.com>
> Acked-by: Neil Horman <nhorman@...hat.com>
> Reviewed-by: Stanislaw Gruszka <sgruszka@...hat.com>
> 
> 
> ---
> diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
> index 668327c..9db5df7 100644
> --- a/drivers/net/s2io.c
> +++ b/drivers/net/s2io.c
> @@ -6684,6 +6684,35 @@ static int s2io_ethtool_op_set_tso(struct
> net_device *dev, u32 data) 
>  	return 0;
>  }
> +static int s2io_ethtool_set_flags(struct net_device *dev, u32 data)
> +{
> +	struct s2io_nic *sp = netdev_priv(dev);
> +	int rc = 0;
> +	int changed = 0;
> +
> +	if (data & ETH_FLAG_LRO) {
> +		if (lro_enable) {
> +			if (!(dev->features & NETIF_F_LRO)) {
> +				dev->features |= NETIF_F_LRO;
> +				changed = 1;
> +			}
> +		} else
> +			rc = -EINVAL;
> +	} else if (dev->features & NETIF_F_LRO) {
> +		dev->features &= ~NETIF_F_LRO;
> +		changed = 1;
> +	}
> +
> +	if (changed && netif_running(dev)) {
> +		s2io_stop_all_tx_queue(sp);
> +		s2io_card_down(sp);
> +		sp->lro = dev->features & NETIF_F_LRO;
> +		rc = s2io_card_up(sp);
> +		s2io_start_all_tx_queue(sp);
> +	}
> +
> +	return rc;
> +}
>  
>  static const struct ethtool_ops netdev_ethtool_ops = {
>  	.get_settings = s2io_ethtool_gset,
> @@ -6701,6 +6730,8 @@ static const struct ethtool_ops
> netdev_ethtool_ops = { .get_rx_csum = s2io_ethtool_get_rx_csum,
>  	.set_rx_csum = s2io_ethtool_set_rx_csum,
>  	.set_tx_csum = s2io_ethtool_op_set_tx_csum,
> +	.set_flags = s2io_ethtool_set_flags,
> +	.get_flags = ethtool_op_get_flags,
>  	.set_sg = ethtool_op_set_sg,
>  	.get_tso = s2io_ethtool_op_get_tso,
>  	.set_tso = s2io_ethtool_op_set_tso,
> --
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