linux-kernel - RE: [PATCH net-next v14 08/13] rtase: Implement net_device

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Message-ID: <be8a2a6a965f4dfca61febdaff556e63@realtek.com>
Date:   Thu, 14 Dec 2023 12:47:49 +0000
From:   JustinLai0215 <justinlai0215@...ltek.com>
To:     Paolo Abeni <pabeni@...hat.com>,
        "kuba@...nel.org" <kuba@...nel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "andrew@...n.ch" <andrew@...n.ch>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Larry Chiu <larry.chiu@...ltek.com>
Subject: RE: [PATCH net-next v14 08/13] rtase: Implement net_device_ops

> 
> On Fri, 2023-12-08 at 17:47 +0800, Justin Lai wrote:
> > +static netdev_features_t rtase_fix_features(struct net_device *dev,
> > +                                         netdev_features_t
> features)
> > +{
> > +     netdev_features_t features_fix = features;
> > +
> > +     if (dev->mtu > MSS_MAX)
> > +             features_fix &= ~NETIF_F_ALL_TSO;
> > +
> > +     if (dev->mtu > ETH_DATA_LEN)
> > +             features_fix &= ~NETIF_F_ALL_TSO;
> 
> This latter condition is strictly more restrictive than the previous one, you can
> drop the latter. Also could you please drop a note about the why of it?

We don't support TSO for jumbo frames, so I will remove the MSS_MAX part.
> 
> Cheers,
> 
> Paolo