linux-kernel - Re: [PATCH] iio: imu: adis16480: clean up a condition

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Date:   Thu, 26 Sep 2019 14:36:30 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
Cc:     "lars@...afoo.de" <lars@...afoo.de>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "Popa, Stefan Serban" <StefanSerban.Popa@...log.com>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>,
        "knaack.h@....de" <knaack.h@....de>
Subject: Re: [PATCH] iio: imu: adis16480: clean up a condition

On Thu, Sep 26, 2019 at 11:06:39AM +0000, Ardelean, Alexandru wrote:
> On Thu, 2019-09-26 at 11:10 +0300, Dan Carpenter wrote:
> > [External]
> > 
> > The "t" variable is unsigned so it can't be less than zero.  We really
> > are just trying to prevent divide by zero bugs so just checking against
> > zero is sufficient.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> > ---
> >  drivers/iio/imu/adis16480.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
> > index b99d73887c9f..e144e567675d 100644
> > --- a/drivers/iio/imu/adis16480.c
> > +++ b/drivers/iio/imu/adis16480.c
> > @@ -318,7 +318,7 @@ static int adis16480_set_freq(struct iio_dev
> > *indio_dev, int val, int val2)
> >  	unsigned int t, reg;
> 
> I would just change the type of "t" to "int".
> Especially, since "val" & "val2" are "int".
> 

Yeah, but negatives or high values are basically fine.  We only care
zero.

regards,
dan carpenter