linux-kernel - Re: [PATCH][next] iio: tsl2x7x/tsl2772: avoid potential division by zero

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Message-ID: <20180531092801.bsmqujkfnge3xhpo@0dcddc0a723b>
Date:   Thu, 31 May 2018 05:28:01 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] iio: tsl2x7x/tsl2772: avoid potential division by
 zero

On Wed, May 30, 2018 at 07:19:36PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> It may be possible for tsl2772_get_lux to return a zero lux value
> and hence a division by zero can occur when lux_val is zero. Check
> for this case and return -ERANGE to avoid the division by zero.
> 
> Detected by CoverityScan, CID#1469484 ("Division or modulo by zero")
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Brian Masney <masneyb@...tation.org>