linux-kernel - Re: [PATCH] iio: adc: xilinx: check return value of xadc_write_adc

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Date:   Sat, 5 Jan 2019 16:45:21 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Michal Simek <michal.simek@...inx.com>
Cc:     Aditya Pakki <pakki001@....edu>, <kjlu@....edu>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Manish Narani <manish.narani@...inx.com>,
        <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iio: adc: xilinx: check return value of
 xadc_write_adc_reg

On Thu, 3 Jan 2019 12:16:49 +0100
Michal Simek <michal.simek@...inx.com> wrote:

> On 27. 12. 18 20:54, Aditya Pakki wrote:
> > In function xadc_probe, xadc_write_adc_reg can return an error value
> > when write fails. The fix checks for the return value consistent with
> > other invocations of the latter function.
> > 
> > Signed-off-by: Aditya Pakki <pakki001@....edu>
> > ---
> >  drivers/iio/adc/xilinx-xadc-core.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
> > index 3f6be5ac049a..b13c61539d46 100644
> > --- a/drivers/iio/adc/xilinx-xadc-core.c
> > +++ b/drivers/iio/adc/xilinx-xadc-core.c
> > @@ -1273,8 +1273,10 @@ static int xadc_probe(struct platform_device *pdev)
> >  			xadc->threshold[i] = 0xffff;
> >  		else
> >  			xadc->threshold[i] = 0;
> > -		xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
> > +		ret = xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
> >  			xadc->threshold[i]);
> > +		if (ret)
> > +			goto err_free_irq;
> >  	}
> >  
> >  	/* Go to non-buffered mode */
> >   
> 
> Reviewed-by: Michal Simek <michal.simek@...inx.com>
> 
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> Thanks,
> Michal