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Date: Mon, 8 Jan 2024 13:00:00 +0200
From: Vladimir Oltean <olteanv@gmail.com>
To: =?utf-8?B?QXLEsW7DpyDDnE5BTA==?= <arinc.unal@arinc9.com>
Cc: Simon Horman <horms@kernel.org>, Daniel Golle <daniel@makrotopia.org>,
	Landen Chao <Landen.Chao@mediatek.com>,
	DENG Qingfang <dqfext@gmail.com>,
	Sean Wang <sean.wang@mediatek.com>, Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
	David Bauer <mail@david-bauer.net>, mithat.guner@xeront.com,
	erkin.bozoglu@xeront.com,
	Luiz Angelo Daros de Luca <luizluca@gmail.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: Re: [PATCH net-next] net: dsa: mt7530: support OF-based registration
 of switch MDIO bus
Message-ID: <20240108110000.aujqhlufehngtkjj@skbuf>
References: <20240106122142.235389-1-arinc.unal@arinc9.com>
 <20240107195241.GB132648@kernel.org>
 <65274929-fa59-482c-a744-6b9ce162ab46@arinc9.com>
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On Mon, Jan 08, 2024 at 01:22:18PM +0300, Arınç ÜNAL wrote:
> > > diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> > > index 391c4dbdff42..39d7e7ad7154 100644
> > > --- a/drivers/net/dsa/mt7530.c
> > > +++ b/drivers/net/dsa/mt7530.c
> > > @@ -2153,17 +2153,25 @@ mt7530_free_irq(struct mt7530_priv *priv)
> > >   static int
> > >   mt7530_setup_mdio(struct mt7530_priv *priv)
> > >   {
> > > +	struct device_node *mnp, *np = priv->dev->of_node;
> > >   	struct dsa_switch *ds = priv->ds;
> > >   	struct device *dev = priv->dev;
> > >   	struct mii_bus *bus;
> > >   	static int idx;
> > > -	int ret;
> > > +	int ret = 0;
> > > +
> > > +	mnp = of_get_child_by_name(np, "mdio");
> > > +
> > > +	if (mnp && !of_device_is_available(mnp))
> > > +		goto out;
> > 
> > nit: I think it would easier on the eyes to simply
> > 
> > 		return 0;

Actually "return 0" leaks "mnp". An of_node_put() is needed.