linux-kernel - Re: [PATCH v4 01/26] staging: iio: tsl2583: check if chip is in a working state in in_illuminance_calibrate

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ea839505-4ffc-832c-ed14-91a709db2aa6@kernel.org>
Date:   Sun, 13 Nov 2016 11:54:45 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Brian Masney <masneyb@...tation.org>, linux-iio@...r.kernel.org
Cc:     devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
        lars@...afoo.de, pmeerw@...erw.net, knaack.h@....de,
        linux-kernel@...r.kernel.org, Jon.Brenner@....com
Subject: Re: [PATCH v4 01/26] staging: iio: tsl2583: check if chip is in a
 working state in in_illuminance_calibrate_store

On 12/11/16 18:19, Brian Masney wrote:
> in_illuminance_calibrate_store() did not check to see if the chip is
> in a working state. This patch adds the proper check. The return value
> from taos_als_calibrate() was also not checked in this function, so the
> proper check was also added while changes are being made here.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
Applied
> ---
>  drivers/staging/iio/light/tsl2583.c | 17 ++++++++++++++---
>  1 file changed, 14 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
> index 1a7be12..de54e74 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -501,16 +501,27 @@ static ssize_t in_illuminance_calibrate_store(struct device *dev,
>  {
>  	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
>  	struct tsl2583_chip *chip = iio_priv(indio_dev);
> -	int value;
> +	int value, ret;
>  
>  	if (kstrtoint(buf, 0, &value) || value != 1)
>  		return -EINVAL;
>  
>  	mutex_lock(&chip->als_mutex);
> -	taos_als_calibrate(indio_dev);
> +
> +	if (chip->taos_chip_status != TSL258X_CHIP_WORKING) {
> +		ret = -EBUSY;
> +		goto done;
> +	}
> +
> +	ret = taos_als_calibrate(indio_dev);
> +	if (ret < 0)
> +		goto done;
> +
> +	ret = len;
> +done:
>  	mutex_unlock(&chip->als_mutex);
>  
> -	return len;
> +	return ret;
>  }
>  
>  static ssize_t in_illuminance_lux_table_show(struct device *dev,
>