linux-kernel - Re: [PATCH v3 1/3] watchdog: qcom: add support for KPSS WDT

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Message-ID: <20140925190054.GJ868@joshc.qualcomm.com>
Date:	Thu, 25 Sep 2014 14:00:54 -0500
From:	Josh Cartwright <joshc@...eaurora.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Wim Van Sebroeck <wim@...ana.be>, linux-watchdog@...r.kernel.org,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 1/3] watchdog: qcom: add support for KPSS WDT

On Thu, Sep 25, 2014 at 11:38:57AM -0700, Guenter Roeck wrote:
> On Thu, Sep 25, 2014 at 12:48:51PM -0500, Josh Cartwright wrote:
> > Add a driver for the watchdog timer block found in the Krait Processor
> > Subsystem (KPSS) on the MSM8960, APQ8064, and IPQ8064.
> > 
> > Signed-off-by: Josh Cartwright <joshc@...eaurora.org>
> 
> Hi Josh,
> 
> just a couple of minor comments this time (yes, I know,
> I am being difficult ;-).

Difficult, maybe, but at least someone's taking a look!  Thanks, again.

[..]
> > +++ b/drivers/watchdog/qcom-wdt.c
[..]
> > +static int qcom_wdt_probe(struct platform_device *pdev)
> > +{
> > +	struct qcom_wdt *wdt;
> > +	struct resource *res;
> > +	int ret;
> > +
> > +	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
> > +	if (!wdt)
> > +		return -ENOMEM;
> > +
> > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +	wdt->base = devm_ioremap_resource(&pdev->dev, res);
> > +	if (IS_ERR(wdt->base)) {
> > +		ret = PTR_ERR(wdt->base);
> > +		goto err_out;
> 
> This is really unnecessary. Just return PTR_ERR((wdt->base) as you did before.
> No need to make the code more complicated than necessary.
> 
> Basic rule is: If you can return immediately, do it. Otherwise use goto
> and have a single error handler.
> 
> > +	}
> > +
> > +	wdt->clk = devm_clk_get(&pdev->dev, NULL);
> > +	if (IS_ERR(wdt->clk)) {
> > +		ret = PTR_ERR(wdt->clk);
> > +		goto err_out;
> 
> Same here.
> 
> > +	}
> > +
> > +	ret = clk_prepare_enable(wdt->clk);
> > +	if (ret) {
> > +		dev_err(&pdev->dev, "failed to setup clock\n");
> > +		goto err_out;
> 
> and here.

Okay, I can fix these up.

  Josh

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