linux-kernel - Re: [PATCH v2] iio: accel: bma180: use iio helper function to guarantee direct mode

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] [day] [month] [year] [list]

Date:	Mon, 15 Aug 2016 17:13:11 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Alison Schofield <amsfield22@...il.com>
Cc:	knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: accel: bma180: use iio helper function to
 guarantee direct mode

On 25/07/16 20:11, Alison Schofield wrote:
> Replace the code that guarantees the device stays in direct mode
> with iio_device_claim_direct_mode() which does same.
> 
> Signed-off-by: Alison Schofield <amsfield22@...il.com>
> Cc: Daniel Baluta <daniel.baluta@...il.com>
Applied.

Thanks,

Jonathan
> ---
> Changes in v2:
>  - put back private data lock I had removed in v1.
> 
>  drivers/iio/accel/bma180.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
> index e3f88ba..0890934 100644
> --- a/drivers/iio/accel/bma180.c
> +++ b/drivers/iio/accel/bma180.c
> @@ -469,13 +469,14 @@ static int bma180_read_raw(struct iio_dev *indio_dev,
>  
>  	switch (mask) {
>  	case IIO_CHAN_INFO_RAW:
> +		ret = iio_device_claim_direct_mode(indio_dev);
> +		if (ret)
> +			return ret;
> +
>  		mutex_lock(&data->mutex);
> -		if (iio_buffer_enabled(indio_dev)) {
> -			mutex_unlock(&data->mutex);
> -			return -EBUSY;
> -		}
>  		ret = bma180_get_data_reg(data, chan->scan_index);
>  		mutex_unlock(&data->mutex);
> +		iio_device_release_direct_mode(indio_dev);
>  		if (ret < 0)
>  			return ret;
>  		*val = sign_extend32(ret >> chan->scan_type.shift,
>