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SubjectRe: [PATCH V3 5/8] Enable cxgb3 to support zerocopy
On 04/20/2011 01:13 PM, Shirley Ma wrote:
> Signed-off-by: Shirley Ma <xma@us.ibm.com>
> ---
>
> drivers/net/cxgb3/cxgb3_main.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
> index 9108931..93a1101 100644
> --- a/drivers/net/cxgb3/cxgb3_main.c
> +++ b/drivers/net/cxgb3/cxgb3_main.c
> @@ -3313,7 +3313,7 @@ static int __devinit init_one(struct pci_dev *pdev,
> netdev->features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
> netdev->features |= NETIF_F_GRO;
> if (pci_using_dac)
> - netdev->features |= NETIF_F_HIGHDMA;
> + netdev->features |= NETIF_F_HIGHDMA | NETIF_F_ZEROCOPY;
>
> netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
> netdev->netdev_ops = &cxgb_netdev_ops;

The features handling has been reworked in net-next and patches like this
won't apply as the code you're patching has changed. Also core code now
does a lot of the related work and you'll need to tell it what to do with
any new flags.

What properties does a device or driver need to meet to set this flag? It
seems to be set a bit too unconditionally. For example, does it work if one
disables scatter/gather?


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