netdev - Re: [net-next 14/17] i40e: implement ethtool RSS config

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Date:	Sun, 23 Nov 2014 03:52:32 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>, davem@...emloft.net,
	Mitch Williams <mitch.a.williams@...el.com>,
	netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
	jogreene@...hat.com
Subject: Re: [net-next 14/17] i40e: implement ethtool RSS config

On Sat, 2014-11-22 at 10:22 -0800, Eric Dumazet wrote:
> On Fri, 2014-11-21 at 21:55 -0800, Jeff Kirsher wrote:
[...]
> > +static int i40e_set_rxfh(struct net_device *netdev, const u32 *indir,
> > +			 const u8 *key)
> > +{
> > +	struct i40e_netdev_priv *np = netdev_priv(netdev);
> > +	struct i40e_vsi *vsi = np->vsi;
> > +	struct i40e_pf *pf = vsi->back;
> > +	struct i40e_hw *hw = &pf->hw;
> > +	u32 reg_val;
> > +	int i, j;
> > +
> > +	if (indir) {
> > +		for (i = 0, j = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++) {
> > +			reg_val = indir[j++];
> 
> Shouldn't you check the indir[X] values are in correct range ?
> 
> ( seems to be between 0 and [pf->rss_size_max - 1] )
[...]

The caller guarantees to do that.

Ben.

-- 
Ben Hutchings
Never put off till tomorrow what you can avoid all together.

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