linux-kernel - Re: [PATCH v4 1/7] phy: add a driver for the Berlin SATA PHY

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Message-ID: <20140520144058.GE21579@kwain>
Date:	Tue, 20 May 2014 16:40:58 +0200
From:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	sebastian.hesselbarth@...il.com, tj@...nel.org, kishon@...com,
	alexandre.belloni@...e-electrons.com,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	jszhang@...vell.com, linux-arm-kernel@...ts.infradead.org,
	linux-ide@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/7] phy: add a driver for the Berlin SATA PHY

On Tue, May 20, 2014 at 04:06:52PM +0200, Antoine Ténart wrote:
> Hi,
> 
> On Tue, May 20, 2014 at 02:34:20PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > On Tuesday, May 20, 2014 11:04:29 AM Antoine Ténart wrote:
> > > +
> > > +static struct phy_berlin_desc desc[] = {
> > > +	{ .val = POWER_DOWN_PHY0 },
> > > +	{ .val = POWER_DOWN_PHY1 },
> > 
> > Only .val entry of struct phy_berlin_desc is initialized and needed,
> > it seems that u32 vals[] should be used instead of desc[].
> 
> Sure.
> 
> > > +
> > > +static int phy_berlin_sata_probe(struct platform_device *pdev)
> > > +{
> > > +	struct device *dev = &pdev->dev;
> > > +	struct phy *phy;
> > > +	struct phy_provider *phy_provider;
> > > +	struct phy_berlin_priv *priv;
> > > +	struct resource *res;
> > > +	int i;
> > > +
> > > +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> > > +	if (!priv)
> > > +		return -ENOMEM;
> > > +
> > > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

We also need to check res isn't NULL here.

> > > +	priv->base = devm_ioremap(dev, res->start, resource_size(res));
> > > +	if (IS_ERR(priv->base))
> > > +		return PTR_ERR(priv->base);
> > 
> > devm_ioremap() (contrary to devm_ioremap_resource()) returns a valid
> > pointer or NULL so return value checking should be fixed.
> 
> I'll fix this.

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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