Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1501300 > unrolled thread

Re: [PATCH] iio: pressure: mpl3115: claim direct mode during raw reads

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: [PATCH] iio: pressure: mpl3115: claim direct mode during raw  reads Jonathan Cameron <jic23@kernel.org> - 2016-10-15 17:10 +0200

#1501300 — Re: [PATCH] iio: pressure: mpl3115: claim direct mode during raw reads

On 11/10/16 20:33, Alison Schofield wrote:
> Driver was checking for direct mode but not locking it.  Use
> claim/release helper functions to guarantee the device stays
> in direct mode during raw reads.
> 
> Signed-off-by: Alison Schofield <amsfield22@gmail.com>
breaks again also the goto goes to an 'unsual location'.

You don't even need the gotos if you put that unwind code
in the standard spot and use break whenever there is an error
to drop out of the switch statement.

I've fixed up and applied, please take a look.

Applied to the togreg branch of iio.git and pushed out
as testing for the autobuilders to play with it.

Thanks,

Jonathan


> ---
>  drivers/iio/pressure/mpl3115.c | 23 ++++++++++++++---------
>  1 file changed, 14 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c
> index 6392d7b..fb36f7d 100644
> --- a/drivers/iio/pressure/mpl3115.c
> +++ b/drivers/iio/pressure/mpl3115.c
> @@ -82,8 +82,9 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev,
>  
>  	switch (mask) {
>  	case IIO_CHAN_INFO_RAW:
> -		if (iio_buffer_enabled(indio_dev))
> -			return -EBUSY;
> +		ret = iio_device_claim_direct_mode(indio_dev);
> +		if (ret)
> +			return ret;
>  
>  		switch (chan->type) {
>  		case IIO_PRESSURE: /* in 0.25 pascal / LSB */
> @@ -91,31 +92,35 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev,
>  			ret = mpl3115_request(data);
>  			if (ret < 0) {
>  				mutex_unlock(&data->lock);
> -				return ret;
> +				goto release;
>  			}
>  			ret = i2c_smbus_read_i2c_block_data(data->client,
>  				MPL3115_OUT_PRESS, 3, (u8 *) &tmp);
>  			mutex_unlock(&data->lock);
>  			if (ret < 0)
> -				return ret;
> +				goto release;
>  			*val = be32_to_cpu(tmp) >> 12;
> -			return IIO_VAL_INT;
> +			ret = IIO_VAL_INT;
>  		case IIO_TEMP: /* in 0.0625 celsius / LSB */
>  			mutex_lock(&data->lock);
>  			ret = mpl3115_request(data);
>  			if (ret < 0) {
>  				mutex_unlock(&data->lock);
> -				return ret;
> +				goto release;
>  			}
>  			ret = i2c_smbus_read_i2c_block_data(data->client,
>  				MPL3115_OUT_TEMP, 2, (u8 *) &tmp);
>  			mutex_unlock(&data->lock);
>  			if (ret < 0)
> -				return ret;
> +				goto release;
>  			*val = sign_extend32(be32_to_cpu(tmp) >> 20, 11);
> -			return IIO_VAL_INT;
> +			ret = IIO_VAL_INT;
>  		default:
> -			return -EINVAL;
> +			ret = -EINVAL;
> +
> +release:
> +		iio_device_release_direct_mode(indio_dev);
> +		return ret;
>  		}
>  	case IIO_CHAN_INFO_SCALE:
>  		switch (chan->type) {
> 

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web