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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dan Robertson <dan@dlrobertson.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Linus Walleij <linus.walleij@linaro.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	linux-iio@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] iio: accel: bma400: integer underflow setting accel scale
Date: Thu, 16 Jan 2020 09:24:38 +0300
Message-ID: <20200116061916.GH9562@kadam> (raw)
In-Reply-To: <20200115181717.GA22797@nessie>

On Wed, Jan 15, 2020 at 06:17:17PM +0000, Dan Robertson wrote:
> On Wed, Jan 15, 2020 at 08:45:31PM +0300, Dan Carpenter wrote:
> > We put an upper bound on "val2" but we also need to prevent negative
> > values.
> > 
> > Fixes: 465c811f1f20 ("iio: accel: Add driver for the BMA400")
> > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> > ---
> >  drivers/iio/accel/bma400_core.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
> > index ab4a158b35af..ffc7b146bbfc 100644
> > --- a/drivers/iio/accel/bma400_core.c
> > +++ b/drivers/iio/accel/bma400_core.c
> > @@ -752,7 +752,7 @@ static int bma400_write_raw(struct iio_dev *indio_dev,
> >  		mutex_unlock(&data->mutex);
> >  		return ret;
> >  	case IIO_CHAN_INFO_SCALE:
> > -		if (val != 0 || val2 > BMA400_SCALE_MAX)
> > +		if (val != 0 || val2 < 0 || val2 > BMA400_SCALE_MAX)
> 
> AFAIK if val2 is less than BMA400_SCALE_MIN we should return -EINVAL.
> 

Ah.  Thanks.  Let me resend.

regards,
dan carpenter


  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15 17:45 Dan Carpenter
2020-01-15 17:43 ` Dan Robertson
2020-01-15 18:09   ` Dan Carpenter
2020-01-15 17:58     ` Dan Robertson
2020-01-15 18:17 ` Dan Robertson
2020-01-16  6:24   ` Dan Carpenter [this message]
2020-01-16 10:08   ` [PATCH v2] iio: accel: bma400: prevent setting accel scale too low Dan Carpenter
2020-01-18 13:34     ` Jonathan Cameron

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