lkml.org 
[lkml]   [2017]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Outreachy kernel] [PATCH] staging: iio: ade7753: replace mlock with driver private lock
On Sun, Mar 12, 2017 at 07:02:50PM +0530, simran singhal wrote:
> The IIO subsystem is redefining iio_dev->mlock to be used by
> the IIO core only for protecting device operating mode changes.
> ie. Changes between INDIO_DIRECT_MODE, INDIO_BUFFER_* modes.
>
> In this driver, mlock was being used to protect hardware state
> changes. Replace it with a lock in the devices global data.
>
> Fix some coding style issues related to white space also.
>
> Signed-off-by: simran singhal <singhalsimran0@gmail.com>

Hi Simran, This looks good to me. Let's see what the
reviewers say. I think the white space stuff is ok,
since it was right where you were editing.
alisons

> ---
> drivers/staging/iio/meter/ade7753.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c
> index dfd8b71..ca99d82 100644
> --- a/drivers/staging/iio/meter/ade7753.c
> +++ b/drivers/staging/iio/meter/ade7753.c
> @@ -81,12 +81,14 @@
> * @tx: transmit buffer
> * @rx: receive buffer
> * @buf_lock: mutex to protect tx and rx
> + * @lock: protect sensor state
> **/
> struct ade7753_state {
> - struct spi_device *us;
> - struct mutex buf_lock;
> - u8 tx[ADE7753_MAX_TX] ____cacheline_aligned;
> - u8 rx[ADE7753_MAX_RX];
> + struct spi_device *us;
> + struct mutex buf_lock;
> + struct mutex lock; /* protect sensor state */
> + u8 tx[ADE7753_MAX_TX] ____cacheline_aligned;
> + u8 rx[ADE7753_MAX_RX];
> };
>
> static int ade7753_spi_write_reg_8(struct device *dev,
> @@ -484,7 +486,7 @@ static ssize_t ade7753_write_frequency(struct device *dev,
> if (!val)
> return -EINVAL;
>
> - mutex_lock(&indio_dev->mlock);
> + mutex_lock(&st->lock);
>
> t = 27900 / val;
> if (t > 0)
> @@ -505,7 +507,7 @@ static ssize_t ade7753_write_frequency(struct device *dev,
> ret = ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg);
>
> out:
> - mutex_unlock(&indio_dev->mlock);
> + mutex_unlock(&st->lock);
>
> return ret ? ret : len;
> }
> --
> 2.7.4
>
> --
> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@googlegroups.com.
> To post to this group, send email to outreachy-kernel@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/20170312133250.GA7772%40singhal-Inspiron-5558.
> For more options, visit https://groups.google.com/d/optout.

\
 
 \ /
  Last update: 2017-03-12 19:33    [W:0.108 / U:1.628 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site