linux-kernel - Re: [PATCH 2/4] mfd: ab8500-gpadc: Suppress 'ignoring regulator

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Date:	Fri, 3 May 2013 12:04:24 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Srinidhi KASAGAR <srinidhi.kasagar@...ricsson.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Bengt Jönsson <bengt.g.jonsson@...ricsson.com>
Subject: Re: [PATCH 2/4] mfd: ab8500-gpadc: Suppress 'ignoring
 regulator_enable() return value' warning

On Fri, 03 May 2013, Linus Walleij wrote:

> On Thu, May 2, 2013 at 5:48 PM, Lee Jones <lee.jones@...aro.org> wrote:
> > drivers/mfd/ab8500-gpadc.c: In function ‘ab8500_gpadc_resume’:
> > drivers/mfd/ab8500-gpadc.c:911:18: warning: ignoring return value of
> >         ‘regulator_enable’, declared with attribute warn_unused_result
> >         [-Wunused-result]
> >
> > Cc: Samuel Ortiz <sameo@...ux.intel.com>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> >  drivers/mfd/ab8500-gpadc.c |    5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
> > index 5e65b28..7278e53 100644
> > --- a/drivers/mfd/ab8500-gpadc.c
> > +++ b/drivers/mfd/ab8500-gpadc.c
> > @@ -907,8 +907,11 @@ static int ab8500_gpadc_suspend(struct device *dev)
> >  static int ab8500_gpadc_resume(struct device *dev)
> >  {
> >         struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
> > +       int ret;
> >
> > -       regulator_enable(gpadc->regu);
> > +       ret = regulator_enable(gpadc->regu);
> > +       if (ret < 0)
> > +               return ret;
> >
> >         pm_runtime_mark_last_busy(gpadc->dev);
> >         pm_runtime_put_autosuspend(gpadc->dev);
> 
> Acked-by: Linus Walleij <linus.walleij@...aro.org>

As it has your Ack, I'm going to add an error print as per Srinidhi's
suggestion, test it again and apply this to my MFD tree.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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