Re: skb_checksum_help

["David S. Miller" <davem@xxxxxxxxxxxxx>]

On Tue, 25 Jan 2005 21:36:07 +0100
Thomas Graf <tgraf@xxxxxxx> wrote:

> NETIF_F_IP_CSUM|NETIF_F_HW_CSUM:
>   Assuming that the vlan accel code can always do the checksumming
>   if the card can do it.

I bet there are cards that don't have VLAN hw assist yet
can properly checksum such packets.  One example I am counting
on to fit this property is the 3c59x.

This is why I'm suggesting some kind of inheritance indication
explicitly from the real_dev driver.  Perhaps even something
like:

        unsigned int vlan_inherited_features;

in the netdev struct.

Basically, I don't want to preclude inheritance of checksumming
capability just because the device doesn't have VLAN assist.