Re: [PATCH net-next 1/2] net: marvell: Implement TC flower offload

[Vadym Kochan <vadym.kochan@plvision.eu>]

Hi Vladimir,

On Wed, Jun 16, 2021 at 03:54:53AM +0300, Vladimir Oltean wrote:
> On Tue, Jun 15, 2021 at 03:54:43PM +0300, Vadym Kochan wrote:
> > +static int prestera_port_set_features(struct net_device *dev,
> > +				      netdev_features_t features)
> > +{
> > +	netdev_features_t oper_features = dev->features;
> > +	int err;
> > +
> > +	err = prestera_port_handle_feature(dev, features, NETIF_F_HW_TC,
> > +					   prestera_port_feature_hw_tc);
> 
> Why do you even make NETIF_F_HW_TC able to be toggled and not just fixed
> to "on" in dev->features? If I understand correctly, you could then delete
> a bunch of refcounting code whose only purpose is to allow that feature
> to be disabled per port.
> 

The only case where it can be used is when user want to disable TC
offloading and apply set of rules w/o skip_hw.

So you think it is OK to not having an ability to disable offloading at
all ?

> > +
> > +	if (err) {
> > +		dev->features = oper_features;
> > +		return -EINVAL;
> > +	}
> > +
> > +	return 0;
> > +}