Re: [SR-IOV driver example 2/3] PF driver: integrate with SR-IOV core

Yu Zhao
2008-12-01T12:42:21Z

On Thu, Nov 27, 2008 at 01:54:27AM +0800, Chris Wright wrote:
> * Greg KH (greg@kroah.com) wrote:
> > > +static int
> > > +igb_virtual(struct pci_dev *pdev, int nr_virtfn)
> > > +{
> > > + unsigned char my_mac_addr[6] = {0x00, 0xDE, 0xAD, 0xBE, 0xEF, 0xFF};
> > > + struct net_device *netdev = pci_get_drvdata(pdev);
> > > + struct igb_adapter *adapter = netdev_priv(netdev);
> > > + int i;
> > > +
> > > + if (nr_virtfn > 7)
> > > + return -EINVAL;
> >
> > Why the check for 7? Is that the max virtual functions for this card?
> > Shouldn't that be a define somewhere so it's easier to fix in future
> > versions of this hardware? :)
>
> IIRC it's 8 for the card, 1 reserved for PF. I think both notions
> should be captured w/ commented constants.

You remember correctly! I'll put some comments there as suggested.

Thanks,
Yu