netdev - Re: [PATCH net-next 13/18] ionic: Add initial ethtool support

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Date:   Mon, 24 Jun 2019 09:26:04 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     netdev@...r.kernel.org
Cc:     Shannon Nelson <snelson@...sando.io>
Subject: Re: [PATCH net-next 13/18] ionic: Add initial ethtool support

On Fri, Jun 21, 2019 at 03:30:20PM -0700, Shannon Nelson wrote:
> On 6/20/19 7:32 PM, Michal Kubecek wrote:
> > On Thu, Jun 20, 2019 at 01:24:19PM -0700, Shannon Nelson wrote:
> > > +	if (ring->tx_pending > IONIC_MAX_TXRX_DESC ||
> > > +	    ring->tx_pending < IONIC_MIN_TXRX_DESC ||
> > > +	    ring->rx_pending > IONIC_MAX_TXRX_DESC ||
> > > +	    ring->rx_pending < IONIC_MIN_TXRX_DESC) {
> > > +		netdev_info(netdev, "Descriptors count must be in the range [%d-%d]\n",
> > > +			    IONIC_MIN_TXRX_DESC, IONIC_MAX_TXRX_DESC);
> > > +		return -EINVAL;
> > > +	}
> > The upper bounds have been already checked in ethtool_set_ringparam() so
> > that the two conditions can never be satisfied here.
> > 
> > ...
> > > +static int ionic_set_channels(struct net_device *netdev,
> > > +			      struct ethtool_channels *ch)
> > > +{
> > > +	struct lif *lif = netdev_priv(netdev);
> > > +	bool running;
> > > +
> > > +	if (!ch->combined_count || ch->other_count ||
> > > +	    ch->rx_count || ch->tx_count)
> > > +		return -EINVAL;
> > > +
> > > +	if (ch->combined_count > lif->ionic->ntxqs_per_lif)
> > > +		return -EINVAL;
> > This has been already checked in ethtool_set_channels().
> 
> That's what I get for copying from an existing driver.  I'll check those and
> clean them up.

The checks in general code were only added recently so most drivers
probably still have their own checks.

Michal Kubecek