linux-kernel - Re: [net-next v16 04/12] net: mtip: The L2 switch driver for imx287

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Message-ID: <20250726221323.0754f3cd@wsk>
Date: Sat, 26 Jul 2025 22:13:23 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, davem@...emloft.net, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
 <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Richard Cochran
 <richardcochran@...il.com>, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, Stefan Wahren
 <wahrenst@....net>, Simon Horman <horms@...nel.org>, Andrew Lunn
 <andrew@...n.ch>
Subject: Re: [net-next v16 04/12] net: mtip: The L2 switch driver for imx287

Hi Jakub,

> On Fri, 25 Jul 2025 00:33:10 +0200 Lukasz Majewski wrote:
> > +	for (i = 0; i < SWITCH_EPORT_NUMBER; i++) {
> > +		fep->ndev[i] = alloc_netdev(sizeof(struct
> > mtip_ndev_priv),
> > +					    fep->ndev_name[i],
> > NET_NAME_USER,
> > +					    ether_setup);
> > +		if (!fep->ndev[i]) {
> > +			ret = -ENOMEM;
> > +			break;
> > +		}
> > +
> > +		fep->ndev[i]->ethtool_ops = &mtip_ethtool_ops;
> > +		fep->ndev[i]->netdev_ops = &mtip_netdev_ops;
> > +		SET_NETDEV_DEV(fep->ndev[i], &pdev->dev);
> > +
> > +		priv = netdev_priv(fep->ndev[i]);
> > +		priv->dev = fep->ndev[i];
> > +		priv->fep = fep;
> > +		priv->portnum = i + 1;
> > +		fep->ndev[i]->irq = fep->irq;
> > +
> > +		mtip_setup_mac(fep->ndev[i]);
> > +
> > +		ret = register_netdev(fep->ndev[i]);
> > +		if (ret) {
> > +			dev_err(&fep->ndev[i]->dev,
> > +				"%s: ndev %s register err: %d\n",
> > __func__,
> > +				fep->ndev[i]->name, ret);
> > +			break;
> > +		}  
> 
> Error handling in case of register_netdev() still buggy, AFAICT.

I've added the code to set fep->ndev[i] = NULL to mtip_ndev_cleanup().
IMHO this is the correct place to add it.


Best regards,

Lukasz Majewski

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